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Prev Professional Automotive Repair Technical Discussions for November 6, 2008
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(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
1991 Buick Park Avenue 3.8L No Start VIN: 1G4CW53L8M
This car has been killin me for 2 days, Crank no start, no rpm signal, good fuel pressure, no injector pulse, has 12 volts to injectors, followed gm pinpoint test to replacing ignition module, no fix, then replaced crank sensor, no fix, checked all wires from ...
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1995 Buick LeSabre Custom 3.8L Starting VIN: 1G4HR52L95
Hi too all, and thank you in advance. This vehicle has a problem starting when it's hot. If the vehicle is driven, and turned off for a period of ten seconds, it has a hard time starting, the engine turns as if the timing was extremely retarded. It feels almo...
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2002 Cadillac DeVille DHS 4.6L MIL Lamp on VIN: 1G6KE54Y22
this vicicle originally came in with mil light on, and po420 code stored. customer went and bought a walker converter, which we installed for him. a week later the mil light came on again and found same code present, had customer get converter warrantied and r... Trouble codes: 420 (catalyst ineffiency)
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1984 Chevrolet Corvette 5.7L gearbox VIN: 2345678900
O'k corvette guru's. My Corvette is 1984 with the doug nash. I have been told that a 1989 or newer 6 speed is a more affordable option than the Richmond. Has anybody done it? Does the shifter fit the same? Bellhousing/ clutch/ propshaft/ speed sensor we have 1...
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1986 Chevrolet C20 Scottsdale 5.7L flexplate VIN: 1GCGC24M8G
about 8 years ago we installed a new gm crate motor, then a few months later a rebuilt transmission. shortly after(about 14 months) gm rebuilt their engine for oil usage. about 4 years later we installed a jasper motor. we have replaced the trans 2 times (th40...
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1998 Chevrolet C2500 Cheyenne 5.7L Hesitation, Surge, Misfire VIN: 1GCGC24R7W
Number 3 clyinder miss going down road and feels like the truck is surging. Fuel trims are good only about 2% either way while driving and at idle. If you command egr off when driving miss goes away. So i pulled upper intake off every thing looks fine, egr por...
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2000 Chevrolet Silverado 2500 6.0L detenation ,no power VIN: 1GCGK29U8Y
this is an intermitant problem only when hot and starting out from a stop, vehicle is gutless and pings,no codes changed fuel pump,filter &regulator,removed cats, still same trans shifts fine fluid is clean ,brakes arent sticking
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2001 Chevrolet Silverado 2500 HD 6.6L bogs under accel. VIN: 1GCHC29151
this vehicle pulls trailer with heavy loads. problem occurs only when pulling heavy load. vehicle will not go over 35 mph when ses light comes on. code p0093 sets only. if clear codes while acting up it runs perfect or if remove load after several stops runs g... Trouble codes: P0093 (fuel system large leak detected)
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2001 Chevrolet Venture LS 3.4L Engine VIN: 1GNDX03E31
After a cold start up, seems to be ok. Engine comes up to a normal operating temperature. Then, the temp. gauge fluctuates. The heater temp. drops, and the engine temp gauge climbs. This cycles for a while, and then engine temperature gauge climbs way past nor...
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2002 Chevrolet Express 3500 5.7L Misfire, MIL Lamp on VIN: 1GBHG31RX2
customer brought van to us with running issues.they put on a new coil,new ign. module,new distributor.cleaned all grounds.problem is it is hard to get it started.know what i have done.check powers&grounds with a headlight brite lit. substitute coil,module,cap.... Trouble codes: P0351, P0300
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2005 Chevrolet Cobalt LS 2.2L MIL Lamp on VIN: 1G1AL52FX5
car came to me stalling. diagnosed bad pcm. replaced pcm. neighbor shop flashed the new pcm. it came back to me with a ses and code p0315. customer has been driving car 10 days and still has ses p0315. thank you for any help. modus with new update 2 days ago h... Trouble codes: P0315
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2004 GMC Yukon SLE 5.3L MIL Lamp on VIN: 1GKEC13T34
The vehicle came in yesterday with rich codes PO172 and PO175 (rich bank 1 and rich bank 2) stored and an abs code CO298 loss of communication with pcm/vcm. The fuel pressure is over 100 psi koer and 50 psi koeo. The fuel pressure spec is 55-62 psi koeo. We kn... Trouble codes: P0172, P0175
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2005 GMC Yukon Denali 6.0L heads VIN: IGKF66U05J
I just want to be sure I have not overlooked something before I spend my customerís money for a teardown of his engine. This 6.0 came in for an overheating problem; we found a very low cooling system and a leaky water pump. After replacing the water pump and t...
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1988 Oldsmobile Delta 88 Royale 3.8L fan speed VIN: 1G3HY51COJ
I have this olds which has the push button fan speed selection. All speeds work except for the hi speed position. I need some ideas before I tear the dash aprt. Thanks for your help Rick
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2002 Pontiac Bonneville SLE 3.8L Body VIN: 1G2HY54K62
Customer complains of a noise at 40 mph and engine rpm @ 1500. It sounds like exhaust noise from inside the car. But everything sounds normal from the outside. When the noise or vibration occurs the trans is in third gear and feels like it has no power on acce...
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2004 Saturn Vue 3.5L Poor Fuel Economy VIN: VGZCZ63484
Request your indulgence, Saturn/GM tech's. I'm a euro tech with a customers Vue. Have complaint of heavy fuel consumption. Getting worse. Brakes system: No drag. Air Filter: New . S Plugs: Original. I only have Snap-On Generic to read OBDII on this...my ...
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2005 Saturn Ion-3 2.2L wheel came off VIN: 1G8AW12F45
customer was driving car and noticed grumbling noise from car and drivers front wheel came off car was towed to my shop and noticed that the some of the aluminium threads from the wheel lugs were on the studs and that all the other wheel lugs were tight on the...
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Fixes & Summaries for GM
Fix/Summary Answers
2001 Buick Century Custom 3.1L 1-2 shift VIN: 2G4WS52591
Thanks to all who responded we did find a wiring harness rubbed through and also a ground wire that was barely hanging on we repaired all wires put transmission back in and works perfectly we had looked for wire problems before pulling the transmission didn't ...
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1993 Chevrolet Corvette 40th Anniversary Edition 5.7L Poor Idle Quality VIN: 1G1YY23P0P
Thanks for the replies. Took the final distributor and retarded it 1 tooth from the master spline and it runs great. Not sure if it was sloppy rebuilding technique or what. I would assume if the timing chain had jumped a tooth, it would take more than 1 too...
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1995 Chevrolet C3500 6.5L Cuts out VIN: 1GBJK34F9S
I PUT A FUEL PUMP FROM A 99 E 250 DIESEL VAN & THAT INCREASED THE FUEL PRESURE TO ABOUT 7 PSE & UNDER HARD EXCELERATION & IT HELD LONGH ENOUGH TO REACH TOP SPEED , BUT AFTER READING ALL OF THE RESPONCE FROM YOU GUYS I BELEVE THAT THIS REPAIR MAY HAVE JUST COVE...
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2000 Chevrolet Blazer LS 4.3L Excessive Emissions, Poor Idle Quality, Poor Fuel Economy, MIL Lamp on VIN: 1GNDT13W0Y
Happy days, happy days. Got the Blazer back in the shop and found that the return line back by the tank was kinked off. Not sure how it got kinked, but the plastic line coming out of the pump had been kinked. Took the line off and had new line made up. Put bac... Trouble codes: P0172, P0175, P1133, P1153.
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2000 Chevrolet Silverado 1500 5.3L Hesitation, Surge VIN: 1GCEK19T7Y
hello all thanks for the tips .customer has not done anything with vehicle yet to my knowledge.i told him to swap maf sensor off his sons truck and see if that will help (only cost there is his time unless it cures the problem).next i suggested to have injecto...
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2001 Chevrolet S10 2.2L Rear Brake Lights VIN: 1GCCS14581
Thanks to everyone who responded, your response was overwhelming. Many responses had focused around the relay for the high mount stop light. Once the customer came back and the lights were not staying on and I could not get the vehicle to act up again. Howeve...
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2004 Chevrolet Tahoe LS 4.8L rear pads and rotors VIN: 1GNEK13V04
This issue has been officially identified and resolved. Several responses mentioned that this vehicle is known for collecting foreign debris between the inner brake rotor and backing plate. After inspecting the original rotors it was clear that heavy rust was ...
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2004 Chevrolet Classic 2.2L Stall VIN: 1G1ND52F64
THANKS TO ALL THE IATN MEMBERS FOR ALL YOUR HELP,& A SPECIAL THANKS TO DERRIK FROM OHIO,HE HELPED FIGURE OUT THE PROBLEM WHICH WAS THE PCM INGECTOR DRIVER
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2004 Chevrolet Tahoe LS 5.3L Electronic VIN: 1GNEK13Z74
well it came back again. no dtc's. drove it and the brakes started dragging again. loosened up the master cylinder from the booster again-ok. so i installed a couple 1/64" alignment shims betweem the booster and the master. seems to be ok now. it seems that we...
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2002 GMC Envoy SLE 4.2L abs VIN: 1KGDS13S32
WHEN THE COMPRESSOR SHORTED OUT IT TOOK OUT THE PCM ALSO . REPLACED PCM AND HAD IT REFLASHED ALONG WITH THE SECURITY SYSTEM . PERFORMED RELEARN CRANK SENSOR SETTING AND ALL IS WELL NOW. MIKE [...]
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2005 GMC Sierra 1500 WT 4.3L rear brakes VIN: 1GTEK14X45
The truck came back in about 2 weeks ago,before this we had replaced the rear shoes about 2 weeks before.When I lifted the truck I found that the right rear was again overtightened but the left side was fine.I looked for anything that was different from side t...
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2000 Oldsmobile Intrigue GX 3.5L Engine Temperature VIN: 1G3WH52H8Y
Well this one is fixed. I ended up doing a couple of things to fix it. I performed a cooling system flush which helped. Took temperature down to 215. Found out that customer lives on a gravel road, pulled cooling fans to clean dust out of fins on the radiator,...
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1996 Pontiac Firebird Formula 5.7L Shock Area VIN: 2G2FV22P6T
This has a few of puzzled the noise happens even if you bounce the car in the shop .. springs are new everything is .. what about a spot weld that i can not see maybe flexing thanks for the help i will send out info if problem is resolved...
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