2001 Pontiac Fuel Economy Engine Transmission MPG (city/hwy) Aztek 3.4 LA1 E4 19/26 Bonneville 3.8 L36 E4 19/30 3.8 L67 E4 18/28 Firebird 3.8 L36 E4 19/31 3.8 L36 M5 19/31 5.7 LS1 M6 19/28 5.7 LS1 E4 18/26 Grand Am 2.4 LD9 E4 21/29 2.4 LD9 S5 21/30 3.4 LA1 E4 21/32 Grand Prix 3.1 LG8 E4 20/29 3.8 L36 E4 20/30 3.8 L67 E4 18/28 Montana 3.4 LA1 E4 19/26 Sunfire 2.2 LN2 L3 23/29 2.2 LN2 E4 23/32 2.4 LD9 E4 21/28 2.2 LN2 S5 22/33