GMC Troubleshooting Questions? Ask a Mechanic for Answers
Hello my name is ***** ***** I will be assisting you with all of your vehicle questions today. Give me one moment while I review your question and come back with a answer. Please be aware I do not know your skill level or abilities so I will be asking a lot of questions and in a lot of cases we will respond to each other quite a lot before we find a solution. As far as the phone calls are concerned they do cost more and I am not the one asking for or pushing for a call the website is.
If you can I would monitor the 02 sensors, after years of abuse their readings begin to slow down and effects how the computer reads, another few things to look for is coking on the throttle body, that should be cleaned to a like new state, and a MAF cleaning, with MAF spray
As far as the reprogram is concerned, you wont know if the trans will accept it unless you have it pulled up to the dealer computer, some will take a new program and some are already at their max programing, like2.3 2.45 2.5 for example
Sure thing, let me know if you have any other questions
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