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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for June 19, 2014
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Open Help Requests for GM
Help Request Answers
2000 Chevrolet Silverado 1500 5.3L MIL Lamp on VIN: 1GCEK19T1Y
This truck came in with a bank 1 knock sensor low voltage. I changed both sensors and the y cord. Now i am getting both sensor codes each time the truck is refueled. However i did use after market sensors and a gm y cord. Has anyone experienced this issue befo... Trouble codes: P0327 (Bank 1 knock sensor), P0332 (Bank 2 knock sensor)
2003 Chevrolet S10 4.3L Master Cyl VIN: 1GCDT19XX3
I need help with this truck, came in with pedal sinking to floor, Put new master cylinder on, and now it is still sinking to floor. bled all 4 wheels no air, re-bled master no air. plug master cylinder and the pedal is hard no sinking. Unplugged the ABS unit i...
2006 Chevrolet Silverado 3500 LT 6.6L Low Power VIN: 1GCJK33D16
This truck set code P0087 on acceleration. Watching the fuel pressure the actual never gets above 10k psi. (desired may be at 17k psi.) The code sets and the fuel system goes to default. With codes cleared and at idle the fuel pressure matches the desired. I c... Trouble codes: P0087 (Fuel Rail Pressure Low)
2010 Chevrolet Silverado 2500 HD LT 6.0L MIL Lamp on VIN: 1GB3CVBK7A
I have this 2010 chevy truck with a 6.0 came in with the codes i listed the 5v refernce buss 1 has 12 volts all the time i have un plugged the map sen, app sen, cam sen,ftp sen,eop sen, still with the 5v reference reading 12 v at all the sensors i unplugged if... Trouble codes: P0106, P0107, P0453, P0523, P0461, P0690
1998 GMC Sonoma SLE 2.2L Surge VIN: 1GTCS1946W
Runs great but when cruising at 60 miles per hour steady rpm up down and engine rubs on rpm but speed still at 60 miles per hour is this engine problem or trans. When it happen fields like engine cuts. Any help will be grat

Fixes & Summaries for GM
Fix/Summary Answers
1998 Chevrolet C2500 Cheyenne 5.0L transmission VIN: 1GCFC24M6W
set up appointment to clean valve body sollenoid on driver side front as members advised but customer has not made it in.will stay in touch as it progresses or not thanks to all but will have to wait till veh makes it to shop
1998 Chevrolet Cavalier 2.2L MIL Lamp on VIN: 3G1JC5242W
Well thank you all for your replies. It seems getting accurate information from the customer is not always possible. How this little buggy ever passed smog is beyond me. Well not entirely beyond me. What I discovered is that yes, it was the wrong head. Fortuna... Trouble codes: P0401 (EGR flow insufficient).
2007 Chevrolet Equinox LT 3.4L Mechanical
Thanks guys, your replies were very infomative. I was especially intrigued with the idea of removing the ABS fuse to rule out a wheel speed issue. As I stated it may take awhile to formally close this with a confirmed fix because it looks like I have a few th...
2008 Chevrolet Silverado 1500 WT 4.3L Excessive Emissions, Poor Idle Quality, Surge, Poor Fuel Economy, MIL Lamp on VIN: 1GCEC19X58
thanks for all the help guys it was much appreciated. I could not get to the bottom of this problem, I checked all grounds found nothing wrong.The customer which also happens to be a good friend ended up taking it to the dealer, they replaced the ecm after abo... Trouble codes: P0172 (Fuel trim rich bank 1), P0175 (Fuel trim rich bank 2), P0068 (Throttle body airflow performance), P0101 (Mass air flow sensor performance), P2272 (Ho2s signal stuck lean bank 2 sensor 2), P2270 (Ho2s signal stuck lean bank 1 sensor 2).
2005 Pontiac G6 3.5L No Start, Stall VIN: 1G2ZG52865
set up appointment to clean throttle body as members advised but customer has not made it in.will stay in touch as it progresses or not thanks to all but will have to wait till veh makes it to shop
2008 Pontiac Grand Prix 3.8L No Start VIN: 2G2WP55228
Hey Guys thanks for all the input! So ended up being the engine harness was bad. The wire that was supplying the ground from the pcm to the p/t relay was broken. SO we justy ran one individual wire for the relay b/c the customer didnt want to change out the en... Trouble codes: P0030, P0036, P0202, P0203, P0204, P0205.
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