1999
GMC SONOMA PICKUP
PRODUCT OVERVIEW: GMC's Sonoma compact ("small") trucks
are designed to appeal to value-
conscious, price-sensitive consumers
who want an around-town vehicle with
the convenience of truckbed hauling.
The Sonoma pickup is positioned as a
rugged, fun-loving vehicle which
delivers power and freedom for the
young at heart.
NEW FOR 1999: * Available content theft alarm (as part
of remote keyless entry system)
* New family of outside mirrors includes
heated feature added to the exterior
electric remote control mirrors which
are included with the convenience
package
* Flash-to-pass feature operates in both
daytime running lights or low-beam
headlamp mode
* Power door locks and power windows
added to convenience package (requires
air conditioning)
* Underhood lamp is deleted for 1999
* Three new exterior colours include
Sunset Gold Metallic, Meadow Green
Metallic, and Victory Red
* Two discontinued exterior colours are
Emerald Green Metallic and Apple Red
MODELS: Sonoma Pickup
(reg. cab, short-box - 2WD)
Sonoma Pickup
(reg. cab, short-box - 4x4)
Sonoma Pickup
(reg. cab, long-box - 2WD)
Sonoma Pickup
(reg. cab, long-box - 4x4)
Sonoma Pickup
(2-door, ext. cab, short-box - 2WD)
Sonoma Pickup
(2-door, ext. cab, short-box - 4x4)
Sonoma Pickup
(3-door, ext. cab, short-box - 2WD)
Sonoma Pickup
(3-door, ext. cab, short-box - 4x4)
VEHICLE CLASS: Small Pickup
ASSEMBLY Linden, New Jersey; Shreveport,
LOCATIONS: Louisiana
CUSTOMER PROFILE: The GMC Sonoma is targeted to males in
their 30s and 40s who want a fun, yet
practical vehicle for day-to-day
driving and light-duty chores. Value
for money, price and overall quality
are essential elements of the buying
decision, along with fun-to-drive
aspects.
PRODUCT MILESTONES:
1982 - GMC Sonoma light-duty pickup
truck debuts
1983 - Extended cab models and Insta-
Trac 4WD system introduced; 2.0L
engine replaces 1.9L
1984 - Off-road package added with
heady-duty springs and gas shock
absorbers
1985 - 2.5L EFI engine replaces 2.2L
engine
1986 - Electronic fuel injection
introduced on 2.8L V6 engine
1987 - New 3-speed automatic
transmission and new quiet
transfer case
1988 - Optional 4.3L EFI V6 and
serpentine-belt-drive introduced;
factory-installed sunroof
introduced
1989 - Rear-wheel anti-lock brakes
(ABS), electronic instrument
cluster, speedometer and new
transfer case introduced
1990 - 5-speed manual transmission;
2.5L engine improvements;
increase in standard equipment
content
1991 - Continuing improvements to 2.5L
engine
1992 - Optional electronic-shift
transfer case for 4WD models
1993 - 4-speed electronic transmission
introduced; balance shaft added
to 4.3L V6 engine
1994 - All-new family of GMC Sonoma
pickups introduced with new
exterior and interior styling;
special sport and off-road
packages introduced
1995 - Addition of standard driver-side
air bag; enhancements to 4.3L V6
and 2.2L L4 engines; revised
chassis packages
1996 - New available Sportside box with
stepside styling; Easy Access
system; 4-wheel ABS on vehicles
with 4-cylinder engine
1997 - Automatic floor shift console
added on extended cab models with
automatic transmission and bucket
seats; spare tire becomes a
compact tire (except with on/off
road tires or sport suspension
packages)
1998 - New exterior front-end
appearance; new features added,
including PASSLock(tm) anti-theft
system; 4-wheel disc brakes
standard on 4x4 models
1999 - Available heated outside
mirrors, power door locks and
windows, and content theft alarm
(included with remote keyless
entry system), and flash-to-pass
system
EXTERIOR FEATURES SL/SLS/SLE
Body Style "Sportside" (not available with - O -
Wide Stance Sport Performance
Suspension)
Bumpers Front and rear step, painted S - -
lower body colour with gray
metallic air dam
Front and rear step, painted - S -
lower body colour with matching
air dam
Front and rear step, painted - - S
lower body colour with gray
metallic air dam (includes
brushed silver front bumper rub
strip)
Rear step bumper delete O - -
(includes a steel colour-keyed
close out panel with a flat for
license plate and lighting
requirements)
Easy Access System Third door (behind driver's O O O
door); provides a driver swing-
out panel for improved
accessibility to the rear seat
area (deletes driver-side rear
jump seat); Extended Cab models
only.
Fog Lamps Fog lights - O O
Glass Solar-Ray,
tinted, all windows S S S
Deep-tinted glass on rear O O O
window. deep-tinted glass on
quarter glass on Extended
Cab/Short Box, 4x4 models;
light-tinted glass on all other
windows.
Grille Painted gray metallic with red S - -
"GMC" letters centered on
grille
Painted body colour with red - S -
"GMC" letters centered on
grille
Chrome with red "GMC" letters - - S
centered on grille
Headlamps Composite with automatic S S S
headlamp control and flash-to-
pass feature
Key Single, two-sided key to S S S
operate ignition and doors
Lights Backup lamps, combination S S S
parking/direction/hazard,
combination
tail/stop/direction/hazard,
license plate lamp, side marker
lamps hazard, license plate
lamp, side marker lamps with
reflectors
Mirrors Left hand and right hand below- S S S
eye-line, painted black
Mouldings Black windshield S S S
Medium gray with bright insert, - - S
body side
Nameplates Tailgate nameplate, "SONOMA" at S S S
lower left, "GMC" at lower
right
B-pillar plaque ("SL," "SLS," S S S
"SLE")
Paint Conventional two-tone - O S
Pickup Box Welded pickup box with double S S S
wall construction and steel
floor
Spare Tire/Carrier Winch type; mounted under frame S S S
at rear with compact spare tire
Striping Lower sport striping - S -
Tow Hooks Left- and right-hand front, S S S
mounted behind air dam (4x4
models)
Wheels 15" x 7" steel, painted gray S S -
Bright trim rings - S -
15" x 7" aluminum, bright with - - S
gray accents
15" x 7" aluminum, bright with - S -
gray accents (Extended
Cab/Short-Box, 2WD)
Wheels 15" x 7" steel, painted gray - O -
with bright trim rings
(Extended Cab/Short-Box, 2WD)
Aluminum, bright with gray O O -
accents (2WD models)
Aluminum, painted silver (4x4 O O -
models)
Windows Rear quarter vent swing out - S S
(Extended Cab/Short-Box, 4x4)
Sliding rear window O O O
Wiper System Adjustable intermittent wipers S S S
with dual fluidic washer
nozzles
S - Standard Equipment. O - Optional Equipment.
INTERIOR FEATURES SL/SLS/SLE
Air Conditioning Front all-weather. includes O O O
instrument panel integrated air
system (not available on 2WD SL
Sonoma)
Armrests Left- and right-hand padded; S S S
integral with door trim panels
Coat Hooks Two colour-keyed (fold-away on S S S
Extended Cab/Short-Box, 4x4)
Convenience Tilt wheel and speed control O O S
Packages
Power door locks, power windows - O O
and exterior heated electric
remote control mirrors;
includes carpeted lower inserts
on door trim panels (requires
air conditioning)
Cup Holders Two-partition cup holder S S S
Doors Colour-keyed plastic trim S S S
panels with left and right
moulded map pockets, colour-
keyed door handle area
Colour-keyed soft cloth upper - S S
inserts with Scotchgard(tm) Fabric
Protector
Floor Covering Full floor, black rubber mat S - -
with back panel carpet
Full floor colour-keyed O S S
carpeting and back panel carpet
with Scotchgard(tm) Fabric
Protector, colour-keyed rubber
front floor mats
Gauges Voltmeter, temperature, oil S S S
pressure, trip odometer and
speedometer
Handle, Assist Located over right hand door; S S S
colour-keyed
Headliner Full roof, foam backed with S S S
colour-keyed cloth cover
Heater and Dual outlet defroster system S S S
Defogger and side window defogger system
Instrument Panel Colour-keyed full width pad S S S
with a non-locking glove box,
cigarette lighter and a storage
pocket under the radio
Two auxiliary electrical power - S S
outlets
Lights Instrument cluster lights, door S S S
activated courtesy and dome
lamps, ashtray and glove box
Mirror Rearview day/night S - -
Rearview day/night with door - S S
activated dual reading lamps
incorporating a 15-second delay-
off feature
Mouldings and Trim Front pillar, rear side, rear S S S
Panels window lower and jack cover
Radios AM/FM stereo with seek/scan, S S -
digital clock, and. two
speakers mounted in the front
portion of the front doors;
Regular and Extended Cab
pickups (with Easy Access
system) also include two
instrument panel speakers;
Extended Cab pickups (without
Easy Access system) also
include two B-pillar speakers
AM/FM stereo with seek/scan, O O S
stereo cassette tape player,
digital clock; includes two
speakers mounted in the front
portion of the front doors;
Regular and Extended Cab
pickups (with Easy Access
system) also include two
instrument panel speakers.
Extended Cab pickups (without
Easy Access system) also
include two B-pillar speakers
AM/FM stereo with seek/scan, O O O
stereo cassette tape with
search and repeat, digital
clock, auto tone control, theft-
deterrent feature and speed
compensated volume; includes a
4-speaker system
AM/FM stereo with seek/scan, CD - O O
player, digital clock, auto
tone control, theft-deterrent
feature and speed compensated
volume; includes a 4-speaker
system
AM/FM stereo with seek/scan, - O O
remote stereo cassette tape
with search and repeat, CD
player, digital clock, auto
tone control, theft-deterrent
feature and speed compensated
volume; includes a 4-speaker
system
Seats Three-passenger bench with S - -
folding back and integral
outboard headrests
60/40 split reclining bench, - S S
includes a centre folding
armrest with storage
compartment, folding backs,
integral outboard headrests,
storage pockets on seat backs
(2WD models); rear jump seats
in custom vinyl trim (Extended
Cab/Short-Box, 4x4)
Reclining driver and passenger, - S S
high back buckets with folding
seat backs, manual lumbar
support adjuster, easy entry
feature on passenger side and
floor console, right hand easy
entry feature (4x4 models);
rear jump seats in custom vinyl
trim (Extended Cab/Short-Box,
4x4)
High back reclining front - O O
buckets, includes driver seat
manual adjustable lumbar
support, a centre colour-keyed
floor console with provisions
for a removable cassette
storage bin, dual cup holders
and a coin holder
Steering Wheel Deluxe 4-spoke black S S -
Leather-wrapped , 4-spoke black - O S
Sunshades Left- and right-hand padded; S S -
colour-keyed cloth with single
blade
Left- and right-hand padded; - O S
colour-keyed cloth with slider
extensions and left hand and
right hand illuminated vanity
mirrors, dual blades
S - Standard Equipment. O - Optional Equipment.
MECHANICAL
SL/SLS/SLE
Block Heater Engine block heater O O O
Brakes Front disc/rear drum brakes S S S
(2WD models)
Four-wheel disc brakes (4x4 S S S
models)
Engines Vortec 2200 Sequential Fuel S S S
Injection (SFI) L4; not /- /- /-
available with locking
differential (only available on
2WD models)
Vortec 4300 Sequential Fuel S S S
Injection (SFI) V6; includes / / /
extra-capacity engine cooling, O O O
engine oil and transmission oil
coolers (available on both 2WD
and 4x4 models)
Locking Locking differential (4x4 O O O
Differential models only)
Shield Package Underbody shield package O O O
includes transfer case and
front differential skid plates,
fuel tank and steering linkage
shields (4x4 models only)
Suspension Smooth Ride Suspension (Z83) O O O
Packages balances 4x4 capability with on-
road comfort and quiet;
recommended for light
trailering and paved road
applications (requires
P205/75R15 all-season tires)
Increased Capacity Suspension O O O
(Z85) includes a larger-
diameter front stabilizer bar
and larger capacity rear
springs than Smooth Ride
Suspension; provides a firm
ride characteristic;
recommended for heavy
trailering and
paved/gravel/unimproved road
applications (requires
P205/75R15 all-season tires on
2WD models and P235/70R16 all-
season tires on 4x4 models)
Sport Suspension (ZQ8) includes - O -
P235/55R16 all-season tires""
and 16" x 8" cast-aluminum
wheels, special ratio power
steering, front stabilizer bar
and gas-pressurized shock
absorbers; recommended for
paved road applications and
heavy-duty trailering, and
provides a hard/sporty ride
characteristic
Off-Road Suspension (ZM6) O O O
includes P235/75R15 on-off road
white-outline tires, special
gas pressurized shock
absorbers, upsized torsion
bars, rear springs, special
jounce bumpers, steering
damper, larger body mounts,
front stabilizer bar;
recommended for larger off-road
applications and heavy-duty
trailering, and provides a very
firm ride characteristic
Wide Stance Sport Performance - O -
Suspension (ZR2) replaces lower
body colour bumpers and air dam
with dark gray bumpers and air
dam; includes 31 X 10.5R-15 on-
off road tires and off-road
suspension, a unique revised
frame for wider track,
strengthened front differential
gears and special rear axle
with 8.5" ring gear, larger
wheel bearings and longer,
drive axles, larger diameter
axle shafts, unique rear
suspension with revised multi-
leaf springs and added rear
axle track bar gas pressurized
shock absorbers, a unique front
stabilizer bar, special front
fenders and pickup box outer
panels with extra wide dark
gray metallic fender flares,
and modified jack and spare
tire stowage winch;.
recommended for severe off-road
applications and provides a
very firm ride characteristic
on a body 50 mm (2") higher
than standard
Tools New, lighter mechanical jack S S S
and wheel wrench behind front
seat
Transfer Case New Process 233, electronic S S S
shift with dash mounted switch
mounted to the right of the
steering wheel, with three
lighted control buttons -
2H/4H/4L; (4x4 models only)
Transmissions 5-speed manual with overdrive S S S
4-speed electronically O O O
controlled automatic with
overdrive and 2nd gear start-up
feature
Tools New, lighter mechanical jack S S S
and wheel wrench behind front
seat
S - Standard Equipment. O - Optional Equipment.
SAFETY AND SECURITY SL/SLS/SLE
Air Bags Next generation driver and S S S
front passenger air bags with
passenger side air bag
suppression switch, located on
the instrument panel next to
the radio
Anti-Lock Brakes Four-wheel ABS S S S
Lights Daytime running lights with S S S
flash-to-pass feature;
automatic headlamp control;
centre high mounted stop lamp
Fog lights
- O O
PASSLock(tm) Theft-deterrent system S
S S
Remote Keyless Remote keyless entry system - O O
Entry (includes power door locks, two
remote transmitters with
content theft alarm and a 40-
second delay dome light
illumination feature)
Roadside Service 24-hour Roadside Assistance S S S
Side Door Side guard door beams S S S
Protection
S - Standard Equipment. O - Optional Equipment.
TECHNICAL PRODUCT INFORMATION
FRAME Welded-steel frame (box section to rear
spring hanger)
BODY MATERIAL Two-sided galvanized steel on most
panels (except roof and box front panel)
SUSPENSION front Independent, (coil spring 2WD; torsion
bar 4x4)
rear Hypoid drive, two stage multi-leaf
springs
BRAKES Hydraulic: power front disc/rear drum
(2WD) power front/rear disc (4x4) 4-
wheel ABS (all models)
STEERING
Type Variable ratio power - standard
Turns N/A
Turning Diameters 11.2 m (36.9 ft.) - Regular Cab/
Short-Box
(2WD)
12.1 m (39.8 ft.) - Regular Cab/
Long-Box (2WD)
11.4 m (37.3 ft.) - Regular Cab/
Short-Box
(4x4)
12.2 m (40.1 ft.) - Regular Cab/
Long-Box (4x4)
12.6 m (41.3 ft.) - Extended Cab/
Short-Box
(2WD)
12.7 m (41.6 ft.) - Extended Cab/
Short-Box
(4x4)
WHEELS 2WD 4x4
15" Standard 15" Standard Steel
Steel
TIRES P205/75R15 P205/75R15
all-season all-season
(includes spare) (includes spare)
ENGINES 2.2L "2200" SFI Vortec 4300 SFI
L4 V6
Type OHV, in-line OHV, 4.3L
4-cylinder V6
Block Cast Iron Cast Iron
Cylinder Head Cast Aluminum Cast Iron
Bore x Stroke 89.00 x 88.00 mm 101.60 x 88.39 mm
(3.50 x 3.46") (4.00 x 3.48")
Displacement 2189 cc 4300 cc
(134 cu.in.) (262 cu.in.)
Compression Ratio 9.0:1 9.2:1
Fuel Regular Unleaded Regular Unleaded
Fuel Induction Sequential-Port Sequential-Port Fuel
Fuel Injection Injection
Horsepower 120 hp @ 5000 rpm 180 hp @ 4400 rpm
(4x4)
175 hp @ 4400 rpm
(2WD)
Torque 140 lb.-ft. 240 lb.-ft.
@ 3600 rpm @ 2800 rpm
(4x4 and 2WD)
Note: There also is an available 190-hp
version of the Vortec 4300 SFI V8 with
250 lb.-ft. torque
LAYOUT Front engine / 2WD (rear) or 4x4
TRANSMISSIONS 5-Speed Manual 4-Speed Automatic
2.2L L4 4.3L V6 2.2L L4 4.3L V6
Gear Ratios 1st 3.94 3.49 3.06 3.06
2nd 2.37 2.16 1.63 1.63
3rd 1.49 1.40 1.00 1.00
4th 1.00 1.00 0.70 0.70
5th 0.83 0.78 --- ---
Reverse 3.65 3.55 2.29 2.29
Final Drive Ratios 3.73 3.08 4.10 3.08
EXTERIOR Regular Cab Regular Cab Extended Cab
DIMENSIONS Short-box Long-box Short-box
Wheelbase 2750 mm 2995 mm 3122 mm
(108.3") (117.9") (122.9")
Length 4828 mm 5235 mm 5199 mm
(190.1") (206.1") (204.7")
Width 1725 mm 1725 mm 1725 mm
( 67.9") ( 67.9") ( 67.9")
Height: 2WD 1578 mm 1598 mm 1593 mm
( 62.1") ( 62.9") ( 62.7")
4x4 1610 mm 1636 mm 1610 mm
( 63.4") ( 64.4") ( 63.4")
INTERIOR DIMENSIONS
Head Room 1002 mm (39.5")
Leg Room 1077 mm (42.4")
Shoulder Room 1445 mm (56.9")
Hip Room 1361 mm (53.6") - Regular Cab
1311 mm (51.6") - Extended Cab
WEIGHTS/CAPACITIES Regular Cab Regular Cab
Short-box Long-box
Curb Weights: 1390 kg. (3060 lb.) 1405 kg. (3100 lb.)
2WD:
4x4: 1625 kg. (3585 lb.) 1670 kg. (3685 lb.)
Seating 3/2 3/2
Fuel Capacity 72 L (15.8 gal) 72 L (15.8 gal)
Cargo Box Volume 1116 L 1362 L
(39.4 cu.ft.) (48.1 cu.ft.)
GVWR (min/max): 1905/2085 kg. 2085/2220 kg.
2WD (4200/4600 lb.) (4600/4900 lb.)
4x4 2110/2335 kg. 2335 kg.
(4650/5150 lb.) (5150 lb.)
Payload (min/max): 550/730 kg. 705/740 kg.
2WD: (1215/1615 lb.) (1555/1635 lb.)
4x4: 520/725 kg. 705 kg. (1555 lb.)
(1150/1600 lb.)
WEIGHTS/CAPACITIES Extended Cab Short-box
Curb Weights: 1470 kg. (3245 lb.)
2WD:
4x4: 1715 kg. (3780 lb.)
Seating 5/4
Fuel Capacity 76 L (16.7 gal)
Cargo Box Volume 1116 L (39.4 cu.ft.)
GVWR (min/max): 2085 kg. (4600 lb.)
2WD
4x4 2110/2335 kg. (4650/5150 lb.)
Payload (min/max): 560 kg. (1240 lb.)
2WD:
4x4: 500/530 kg. (1100/1170 lb.)