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1991 Chevrolet R3500 Silverado 7.4L Lock Up
some thing is commanding pcm to apply torque converter lock up to go on and off causing vehicle to surge while driving at steady speeds on freeway. does anyone out there know what might be causing this. no dtc code, no check engine light on.
FIX posted 3/12/2009
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Message Closed w/FIX
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29 Replies Received
29 Replies Received
Related Documents & Media | VIN | 1GCHR33N3M |
| Engine | 7.4 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Affected | Lock Up |
| Conditions | Lock Up On-Off |
| Misc. | Old Body Style |
Message Closed w/FIX
Vehicle Data
1991 Chevrolet R3500 Silverado
| VIN | 1GCHR33N3M |
| Engine | 7.4 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Affected | Lock Up |
| Conditions | Lock Up On-Off |
| Misc. | Old Body Style |
Video