Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
Need to pull codes to be certain but usually only a throttle body or accelerator pedal will cause reduced power on your year. Can you shoot me the Vin so I can pull up the vehicle build.
I can probably assume you got a p2135 because most people will go straight to throttle body with that one. That having been done I would go after the ecm connector. They suggest crimping the terminals for better tension but I prefer to replace them as trying to tighten them hasn't worked for me much. If you go to any gm dealer and go to parts you can get new terminals but most parts guys don't know how to find them because they don't inventory them. I can go and take a picture of what tray and exact location for you in the morning. All dealers have the same ones so it will be the same anywhere you go. Were there any other codes than that one?
Terminal number is###-##-####its in tray 23 I'll get a picture of it in the morning for you.
here is the connector its the middle one gray on the inside, re-pin terminals 33 34 35 and 54.
no worries i cant take a pic o those terminal trays till morning anyways, if you need i can explain to whomever how to remove and install those pins too, i actually have a pdf with a pretty good write up on the process i will try and link to.
If parts makes you find the terminal yourself the trays are numbered like so and its right where I point in this tray.
It may be a harness issue if the problem occurs when it rains, water will frequently cause shorts in corroded areas in the harness. You can look for areas of concern by spraying a salt water solution on the area and manipulating the harness by hand and seeing if the code will reset immediately.
that would be a huge process to replace the entire harness, i'm sure that would take care of it but it's a bit of an extreme measure to replace the entire engine harness over it, but the pins are part of it. I would repin it and using a spray bottle and moving the harness by hand try and duplicate the concern because its likely just one or two wires.