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Prev Professional Automotive Repair Technical Discussions for September 20, 2012
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Open Help Requests for GM
Help Request Answers
1992 Buick Century Special 3.3L engine VIN: 1G4AG54N5N
Hey guys, I have a low mileage 3.3 buick that dies after a couple miles and won't restart until it cools off. It is not overheating, and runs perfectly right up until it dies. It has good fuel pressure when it won't start, but no spark.I thought it was a speci...
2005 Buick LeSabre Limited 3.8L auto climate controls VIN: 1G4HR54K15
Car at times will blow warmer air from drivers vents. Tried moving temp and vent position no change. Sometimes can turn off unit then back on and it will be fine. sometimes must cycle key off and on to get normal results. Scanned for codes none did a relearn o...
1994 Chevrolet K2500 Suburban 6.5L Rear A/C VIN: 1GNGK26F6R
Customer brought suburban in for rear A/C not cooling. He had Compressor go out last year and had it replaced but rear unit didn't cool. We checked rear expansion valve and it was plugged. Replaced valve and flushed out evaporator core. Checked flow through bo...
1998 Chevrolet K1500 Cheyenne 5.7L Misfire VIN: 2GCEK19RXW
On arrival there was a cam/crank correlation code. The cam retard was reset to 0 degrees. The vehicle will shake under strong acceleration at higher speeds. Example, on the freeway at 55mph kick down to the next gear and accelerate, soon the MIL starts flashin... Trouble codes: P0300, P1345 (Crankshaft position / camshaft position correlation)
2005 Chevrolet Trailblazer LS 4.2L timing chain VIN: 1GNES16S55
Got another one iatn techs. this traiblazer makes a noise right under the top of the front timing belt sounds like the chain rubbin ont guide right on top at least thats what I suspected,I order another guide from the dealer.took the valve cover of fo...
2006 Chevrolet Silverado 1500 HD LT 6.0L No Start, Stall VIN: 1GCGC13U86
Vehicle was towed in, customer states it started to mis then died while driving. I found the Maf and Mis code, checked fuel pressure 55psi, spark is good, injectors have pulse. Fuel volume is good, filled a gallon jug halfway in just a few seconds. I got it to... Trouble codes: P0101, P0300, P1626 (Vehicle Theft Deterent passlock active)
2006 Chevrolet Express 3500 LT 6.0L Hesitation VIN: 1GCHG39U16
When van is hot misfire stumble once in a while plugs ok decarbonized system,anything common ...also did a crank relearn Trouble codes: P0102, P0300, P0175, P0172
2006 Chevrolet Cobalt LS 2.2L MIL Lamp on VIN: 1G1AK15F46
This one is silly. I believe I covered all the bases here. I also replaced intake manifold gaskets/o-rings and filled intake with gas{out of the car of course ) no cracks or leaks found. Air inlet tube checks out good also.MAP/BARO pressure sensor seems to wor... Trouble codes: P0171
2008 Chevrolet Silverado 3500 HD WT 6.6L oil VIN: 1GCHK33608
Hello Duramax specialists. This truck has too much oil in the engine oil pan. I believe that fuel comes in somehow. It adds about 3 liters per 4000 KM. The engine runs perfect, no missfires or smoke. I Thought about too much fuel from one of the injectors. The...
2005 GMC Savana 3500 SLE 4.8L brake system VIN: 1GDGG31VX5
Hi fellow Techs. i have an '05 Savanna with a perennially low brake pedal. the condition is generating complaints. the hydroboost and master cylinder were replaced with salvage components and then with O.E.M components more recently. there dosn't seem to be a ...
1998 Saturn SL2 1.9L vent tube VIN: 1G8ZK5278W
vehicle came in with a sloshing sound under dash with a/c on. put on lift and blew air into vent tube and a gallon of water came out. 2 weeks later same thing. very minor poke or blow of air and it leaks again. 3rd time it happened we pulled the heater core to...

Fixes & Summaries for GM
Fix/Summary Answers
1999 Chevrolet Silverado 1500 4.3L No Start, Stall VIN: 1GCEC14W8X
Inspecting the vehicle found that the pcm lookes very corroided. Took pcm out and found corroision in connector and going inside of pcm. Replaced pcm and vehicle ran better but still had some strange intermitant stalling issue. Found that there was a bad groun...
2001 Oldsmobile Aurora 4.0L master cylider VIN: 1G3GS64C11
Sorry for my ignorance. Looked right past it. I think the k.i.s.s. method would apply here. Both front inner brake pads had the linings broke loose and shifted causing the caliper to push back. Thanks for every ones help. On a lighter note, my 11 son yr son wa...
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