DTC P0128 and/or No Heat from Heater - kw 3.5 GMT355 L52 low no poor
| Subject: | DTC P0128 and/or No Heat from Heater |
| Models: | . |
The following diagnosis might be helpful if the vehicle exhibits the symptom described in the PI.
Condition/Concern:
SES light with a DTC P0128 or a symptom that the vehicle will not blow heat.
Recommendation/Instructions:
This concern could be caused by material blockage at the thermostat. Please inspect the thermostat for evidence of material blockage. If you find material at the thermostat please remove the material and replace the thermostat as necessary.
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Please follow this diagnosis 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. If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance.
Models:
(04 Chevrolet Colorado) and (04 GMC Canyon)
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