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1989 GMC K3500 Sierra SLE 7.4L MIL Lamp on, lack of power
Customer complains of a lack of power ie: truck won't go over 62 miles per hour while cruising. The other thing is under normal to hard acceleration the MIL light comes on at about 44 MPH, and goes back out at about 52 MPH, with the max speed being about 6...
FIX posted 6/28/2000
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Message Closed w/FIX
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Related Documents & Media 
| VIN | 2GTHK39NOK |
| Engine | 7.4 L / 8 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI / Throttle Body Injection |
| Symptoms | MIL Lamp on, Lack of Power |
| Occurs | Cold, Hot, Under Load |
| Misc. | Dual Rear Wheel |
Trouble Codes
| 44 | lean oxygen sensor |
Message Closed w/FIX
Vehicle Data
1989 GMC K3500 Sierra SLE
| VIN | 2GTHK39NOK |
| Engine | 7.4 L / 8 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI / Throttle Body Injection |
| Symptoms | MIL Lamp on, Lack of Power |
| Occurs | Cold, Hot, Under Load |
| Misc. | Dual Rear Wheel |
Trouble Codes
| 44 | lean oxygen sensor |
Video