p2135 code what is cause, gas peddle indicator bad or throttle body
throttle bad. Why?
The problem is with the throttle body it will have to be cleaned and tested after, here is the service bulletin from Cadillac (GM) on the issue and how is fixed.
service bulletin #11-06-04-007B:
https://www.autocodes.com/uploads/gmc/11-06-04-0007B.pdf
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