Loss of Power Hesitates on Acceleration - keywords 2.8 3.5 4.2 4.3 4.8 4L60E 4L65E 5.3 5.7 6.0 accelerate cold L35LK5 LL8 LM7 loss LQ4 LQ9 LS1 LS6 LU3 M30 M32 miss misfire neutral no performance power
| Subject: | Loss of Power Hesitates on Acceleration |
| Models: | 2000-2007 All GM Light Duty Trucks and Cars |
| Equipped With 4L60E (RPO - M30) or 4L65E (RPO - M32) |
This PI is being updated to add recommendations and model years. Please discard PIP3796.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
2.8, 3.5, 4.2, 4.3, 4.8, 5.3, 5.7 and 6.0 engines coupled with the 4L60E or 4L65E may experience a condition of hesitates, misses or loss of power under acceleration. The vehicle may operate as if it is in reduced power mode. There may not be any DTCs associated with this condition.
Recommendation/Instructions:
Duplicate the customers concern and monitor the TFP switch (transmission fluid pressure switch) status and record the readings.
Signal A | Signal B | Signal C |
|---|---|---|
Please contact the Technical Assistance Center at the number you have been provided for more information.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
