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Prev Professional Automotive Repair Technical Discussions for February 15, 2007
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Open Help Requests for GM
Help Request Answers
1992 Buick Regal 3.8L Cuts out, Stall VIN: 2G4WB54L7M
any help on a running rich symptom would be helpful. engine light on but cant blink or hook up scan tool. doesnt comunicate. runs for awhile then floods itself out and dies. fuel pressure constant at 40-45 psi. good compression 130psi.
1995 Buick Century Special 3.1L wot VIN: 1G4AG55M7S
The Customer came with the car and hose, I drove it in the bay. Pulled the Brake Booster hose to access the line at the gear, filled up fluid, reattached the Booster hose and started up the car, it went to wide open throttle with a rev-limiter stile surge. I b... Trouble codes: P1404 (egr 2), P1405 (egr 3)
2001 Buick Century Custom 3.1L MIL Lamp on VIN: 2G4WS52J01
This vehicle about a year and half ago came in with bad miss fire, replace plugs and wires, unknown how long condition had been happening, approx six months ago came in with lack of power, diagnosed plugged convertor, replaced convertor with economy aftermarke... Trouble codes: P0420
1985 Cadillac Eldorado 4.1L heat VIN: 1GMDFKEIRO
both hoses are hot at core blows cold lack of testing info
1995 Chevrolet Tahoe 5.7L Poor Idle Quality VIN: 3GNEK18K6S
this engine will miss or stumble at idle with the transmission in drive. the engine has to be hot. it will happen on average about once every couple of minutes. it feels like a secondary igintion miss but im not sure it is an ignition problem. i can see no pro...
1996 Chevrolet Caprice Classic 4.3L No Start VIN: 1G1BL52W0S
Pass key fault . OK, Caprice classic key pass fault no problem sorted this problem out many times ,problem this time is i don't have a key to measure the ohms , and i do know their is 15 different codes, and i have tired all 15 close to what i can get here on ...
1997 Chevrolet C1500 5.7L neutral safety switch VIN: 1GCEC14R0V
have a 97 chevy pickup in the shop and the neutral safety switch shows on my scan tool that in park,reverse,neutral and overdrive positions it displays low gear. when shifted to drive 3 it says p/n drive 2 says drive 3 and low says drive 2. I tried a new switc...
1998 Chevrolet C2500 Cheyenne 5.0L Fuel Gauge
Hello there I run a speedometer repair shop and have seen this happen on TWO different Chevy Trucks. The Fuel Gauge needle will work correctly but will VIBRATE VERY FAST. IF you place a finger on the needle it feels like an electric toothbrush it vibrates so m...
1999 Chevrolet Tahoe LS 5.7L ignition switch VIN: 1GNEK13R4X
i work at a chrysler dealer and a customer traded in a tohoe. he replaced the ignition switch, that was diagnosed by another shop for no start. i think that the security system is cutting off the injectors. is there a manual way to reset the security. shawn au...
1999 Chevrolet K1500 Suburban 5.7L Rear Heater VIN: 3GNFK16R5X
This is my personal vehicle. I have been busy the last 2 months after purchase performing some needed repairs/maint. I noticed(partially due to the recent cold snap) that the rear heat is blowing cool. I took off the lines going to the rear heater core and bac...
2000 Chevrolet Corvette 5.7L transmission VIN: 1G1YY32G9Y
the scan tool is reading 0 rpm @ all times need test for this problem or info. on what to look for.
2001 Chevrolet Silverado 2500 HD 6.6L Hesitation, Cuts out, MIL Lamp on VIN: 1GCHC29131
truck came in with complaint of cuts out at hiway speeds when less than half a tank of fuel.truck had codes p0093, p0094, p0087, p0700, indicating a severe fuel leak in the we took tank down inspected fuel sendor for holes no leaks found at tank so w... Trouble codes: P0234 (turbo boost out of limits overspeed condition), P0101 (maf out of range)
2001 Chevrolet Express 1500 5.0L Misfire, MIL Lamp on VIN: 1GBFG15M51
Hi all, This is gonna be a long one. This Express van came in about 4 months ago with the starter mounting bolt holes cracked thru the centers. We replaced the engine with a new GM Engine, not rebuilt, but NEW. Since that time it has come back 4 times for the ... Trouble codes: P0300 (Random Cylinder Misfire), P1381 (misfire- no communication with ABS controller)
2002 Chevrolet Avalanche 2500 8.1L calipher VIN: 3GNGK23G62
Hello all, This vehicle came in for pulls right all the time and brakes pulsate. Customer wants performance brake parts. Performed front and alignment and installed EBC dimpled and grooved rotors, EBC brake pads, front and rear, test drove and vehicle drives ...
2003 Chevrolet Silverado 1500 5.3L Blower motor
Greetings GM techs. Sorry about not having a VIN. I got used to getting just the last 8 when calling for GM parts and this one got out the door before It dawned on me that I needed the rest of it to post a request. The blower motor on this vehicle runs at a st...
1989 GMC K1500 Sierra SLE 5.7L master cylinder VIN: 1GTDK14K4K
this truck came in with a low pedal. a new master cylinder was installed by someone else. checked the brakes and shoes were worn and wheel cylinders leaking. i replaced them and adjusted shoes. now when the vehicle is not running it has great brakes but when y...
1999 GMC Sonoma SL 4.3L Transfer case
I installed a new engine in this truck after someone else took the old one out and quit. I generally work on german cars so this truck is totally foreign to me. The job went surprisingly well except for one thing, the transfer case will shift into 4 wheel, how...
1992 Oldsmobile Cutlass Supreme S 3.1L No Start, Cuts out VIN: 1G3WH54T6N
tHIS ISNT A HELP REQUEST, RATHER A HEADS UP ON THE CRANK SIGNAL ON THIS CUTLASS. cRANKING SPEC IS SUPPOSED TO BE BETTER THAN 100 mv , fact is thats not enough. I had an interrmittent stall no start on this car and lost spark and pulse. First thing you think is...
1995 Pontiac Sunfire GT 2.3L Engine VIN: 1G2JD12D7S
We have a 1995 sunfire here it has the 2.3 quad motor. We are looking for a used engine, and the yards we deal with are telling us 95 only... Is it possible to use 1990-1994 engine in this unit? I have checked other cars and it appears to be the same block and...
1996 Pontiac Grand Am SE 2.4L MIL Lamp on VIN: 1G2NE12T1T
This car came in with the MIL on, running fine. I found fault code p0440 (EVAP Fault) and after testing vent and purge solenoids and checking for leaks I repaired a loose connection in the vapor line from the tank to the front mounted canister. After clearing ... Trouble codes: P0440
1999 Pontiac Grand Am SE 2.4L daytime running lights VIN: 1G2NE12T2X
I have researched this problem through the fix database and only came up with a short in the front harness area. I have pulled every wire in the front harness and cannot find any connectors that are corroded. I can't find any connectors at all for that matter....
2005 Pontiac G6 3.5L Engine Miss VIN: 1G2ZG52875
Car came in with customer complaint of car would not start and she had to press accel. pedal to get it to start. Car has started fine for me and I have found P0300 and ran diagnostics for this code and have found nothing. Cylinder #4 has a dead miss. Compressi...

Fixes & Summaries for GM
Fix/Summary Answers
1992 Buick Regal Custom 3.1L No Start VIN: 2G4WB54T3N
First of all want to thank all that replied to my post! Some great idea's; head light hooked to the power & ground going to the module,the test passed & no voltage drop. Rechecked the crank sensor with my modis for a wave form, from what I could see I had wave...
1979 Chevrolet C10 Cheyenne 5.0L Master Cyl. VIN: CCU1491161
Well most people said boster rod adjustment,boster sticking or brake lines. I new it wasn't the brake lines I've had to replace a bunch of them because they would stop up and hold the brake on these were wide open and calipers released good in shop on rack. I ...
2001 Chevrolet Monte Carlo LS 3.4L Hdlights, int lights, VIN: 2G1WW12E41
Thanks to all who replied. The consensus from Joshua, Bill, Michael and Ken was that it sounded like a BCM problem. I removed the BCM, and took it apart. It actually had a couple of holes in the circuit board where the connections had overheated. It makes it m...
2002 Chevrolet Impala LS 3.8L Surge VIN: 2G1WH55K42
thanks to all who replyed, I looked at the transmission info on scane tool whne vehicle has acting up i would get as much as 475 tcc slipage but the duty cycle would only be as high as 40% my diagnosis is cumputer problem. customer refused repairs at this time...
2003 Chevrolet Trailblazer North Face 4.2L liftgate VIN: 1GNDT13S33
The 1st Lift Gate Module we got was bad. Replaced with ANOTHER new one & had it flashed and now everything on the lift gate works.
2004 Chevrolet Tahoe LS 5.3L Speedometer VIN: 1GNEK13T64
Thank you to all, I ended up replacing the speedometer cluster and it works great. I went to two dealers, a Chevy dealer that gave me a price of over $400 and a GMC dealer that got it for me for $275 brand new.Very easy to replace. Thanks again to everyone who...
1998 GMC Jimmy Envoy 4.3L No Start, Hesitation, Stall VIN: 1GKDT13W7W
Just about all the Tech's had this one pegged! Customer has not returned as problem has not returned. Thanks again for all the help and hope to get vehicle back with same problem for a fix.
1999 Oldsmobile Silhouette Premiere 3.4L Hesitation, Cuts out, Misfire VIN: 1GHDX03E3X
we removed intake manifold to remove massive amounts of carbon build up that was breaking loose. then found stuck open purge valve also causing vehicle to run rich. replace exhaust conveteror for third time and test drove vehicle. long term and short term fuel... Trouble codes: P;030, P0171.
1999 Pontiac Grand Am SE 3.4L No Start, Stall VIN: 1G2NF52E0X
Thanks to the people that responded, they were on the right track with the idle air motor system, but it was the air passage that was caked with carbon inside., cleaned it out and the problem was solved. Again, Thanks. Eddie
2001 Pontiac Grand Am SE 3.4L No Start, Cuts out VIN: 1G2NF52E11
found if band on bcm car will die replace and seems ok car has not been back Trouble codes: U1129 (loss of amp comm.), U1000 (loss of class 2 serial comm).
2003 Pontiac Grand Am SE 3.4L Horn VIN: 1G2NF52E53
Thanks to everyone that replied, it was the contacts in the horn button, the replaced the aig bag assembly, the horn never went off on its own. thanks again to everybody.
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