2004 GMC Envoy XUV SLT 4.2L Hesitation, MIL Lamp on, LACK OF POWER
vehicle lacks power and proper shift under load. no trans codes present. can manually shift vehicle into gear ranges without loss of power. transmission does not slip. in neutral engine revs normally without hesitation or other felt problems. no vacuum, electr...
FIX posted 3/20/2007
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Message Closed w/FIX
Vehicle Data2004 GMC Envoy XUV SLT
Trouble Codes
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Message Closed w/FIX
Vehicle Data
2004 GMC Envoy XUV SLT
VIN | 1GKET12S64 |
Engine | 4.2 L / 6 cyl / GAS |
Trans | 4-speed Automatic (Electronic) |
Delivery | FI / SEFI |
Emissions | OBD-II Compliant |
Symptoms | Hesitation, MIL Lamp on, Lack of Power |
Occurs | Always, Under Load |
Trouble Codes
1133 | insufficient switching b1s1 |
1171 | system lean during decel |
P0171 | Fuel System Too Lean (Bank 1) |
P0172 | Fuel System Too Rich (Bank 1) |