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Prev Professional Automotive Repair Technical Discussions for August 15, 2011
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Open Help Requests for GM
Help Request Answers
2004 Cadillac CTS 3.6L Programming New PCM VIN: 1G6DM57794
We replaced the PCM with a Delco reman unit and when trying to program the PCM lots of accessories turn on and cause the programming to crash. I can't find any procedure to keep accessories from turning on or procedures of what to unplug or fuses to remove bef...
1997 Chevrolet Blazer 4.3L No Start VIN: 1GNDT13W8V
This blazer if it seats over night cranks no start long cranks 10 15 sec cranks then fuel pressure stays at 0psi then after keep cranking it will raise to 55psi then start after starts it will restart right away everytime pressure stays at 58psi with ignition ...
1999 Chevrolet Tahoe LT 5.7L Pedal Height VIN: 1GNEK13R1X
Vehicle came in with very low brake pedal, we found completely worn out rear brakes, rear wheel cylinders leaking, front brakes close to wear indicators. Replaced rear wheel cylinders, brake shoes, new drums, adjusted rear brakes according to normal proceedur...
2000 Chevrolet Malibu 3.1L No Start VIN: 1G1NE52J7Y
this one got towed to my shop after being parked for a couple of months... battery was drained so i boosted it and the car started and ran for about 5 minutes then stalled re started and the same thing. now it won t start. checked fuel and spark all is ok. rep...
2002 Chevrolet Tracker ZR2 2.5L Smokes At Start Up VIN: 2CNBJ73432
Shortly after tune up (plugs, fuel filter, pcv valve (oem)) customer called and said it smokes really bad on cold start up. We got car and as she said after stilling over night this thing seems like a mosquito smoker on start up, after runns awhile(12-20 mins)...
2003 Chevrolet Avalanche 1500 5.3L trans VIN: 1GCE3KJ147
this truck has had an issue with trans going neutral during a deaccelaration. trans was rebuilt due to loss of 3-4 gears. but problem still exists. trans work fine no codes seems worse when hot. any ideas
2005 Chevrolet Colorado Sport 3.5L MIL Lamp on VIN: 1GCDT19695
This one has us stumped. MIL light comes on when cruising down the highway and sets code P1133 (HO2S Insufficient Switching Bank 1 Sensor 1). Tested and replaced B1S1 O2 Sensor. This included testing for bias voltage and verifying sensor ground circuit, 2 days... Trouble codes: P1133 (HO2S Insufficient Switching Bank 1 Sensor 1)
2006 Chevrolet Express 3500 6.6L glow plug VIN: 1GBJG31246
any tips on removing broken glow plug in cylinder hesd
2008 Chevrolet Express 3500 6.6L starter VIN: 1GBJG31658
This is para transit van. we have have 15 of these vans. this van in particular has been having this problem for quite awhile now. have to jump start every morning. will not start unless you have a battery charger on it. starter solonoid will only click and al...
2009 Chevrolet Suburban 1500 LT 5.3L Compressor VIN: 1GNFK26309
Vehicle is stored in airplane hangar. Sat for 3 months, customer jumpstarted. Noticed A/C will not engage. Using Tech2 we scanned for HVAC codes, none detected. Request for A/C "Yes". Request then denied on Tech 2. Checked ambient temp sensor, checks good. Air...
2003 Hummer H2 6.0L auto ac VIN: 5GRGN23U53
customer complaint was ac only cools as low as 60 degrees and noise on acceleration, found bulletin for ac compressor noisy on accel with belt damage, verified noise on accel and high side psi was fluctuating rapidly, replaced ac compressor/ reciever dryer, or...
1989 Oldsmobile Cutlass Supreme SL 3.1L Hesitation, Cuts out VIN: 1G3WS14T4K
Power Cuts Out on Vehicle If Throttle Opened Rapidly or too far. Rpm signal on scan tool does not seem to be lost when power is too weak to continue to accelerate,and TPS and MAP signals seem valid. Fuel pressure seems okay and removed and replaced fuel filter...
2006 Pontiac G6 3.5L air bag VIN: 1G2ZM15176
can you program a new air bag module w standards i-flash global programer.

Fixes & Summaries for GM
Fix/Summary Answers
1999 Chevrolet Malibu 3.1L ac system VIN: 1G1ND52J1X
Thank you to all who replied. Everyone who said pressures were low was correct! I evacuated system for 59 minutes and added more freon. I looked in a murray book from the parts store, it listed about 6oz more than the sticker on vehicle. AC was cooling consist...
2007 Chevrolet Equinox LT 3.4L Misfire VIN: 2CNDL73F17
Thx to all that responded. Cust took to dealer and they replaced one wire to cyl #1 Dan
2008 Chevrolet Silverado 1500 LT 5.3L No Start, Stall VIN: 2GCEK13358
Well not sure if this one is fixed or not. I have found multiple problems with this truck. The first problem i did find is that they installed a cb radio in the truck, and the female spade connector was shorting across in fuse box from one that was hot in acce...
2009 Chevrolet Trailblazer LT 4.2L Misfire, MIL Lamp on VIN: 1GNDT33S69
Tim and Mark hit the nail on the head. Turns out these have a high failure rate with valve seats. A new cylinder head was the fix, and the local chevrolet dealer repaired it under the 100,000 mile powertrain warranty. This thing always idled so smooth, I didnt... Trouble codes: P0300 (Random misfire).
2000 Oldsmobile Intrigue GLS 3.5L Excessive Emissions, Poor Fuel Economy VIN: IG3WX52H1Y
this car had multiple problems first there was a software issue as well as the intake gaskets due to the converter clogging.so after i replaced the pcm intake gaskets plugs she runs like a top.oh btw go look up the firing order for this on alldata then go to i...
1994 Pontiac Trans Sport 3.8L No Start VIN: 1GMDU06L8R
It is yet to be determined if this vehicle is fixed or not. As everyone else I too suspected a high level of ethanol so I bought a kit to test it. The result actualy showed 5% ethanol much lower than expected! There was no other contaminate in the fuel that I ...
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