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Prev Professional Automotive Repair Technical Discussions for October 15, 2012
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Open Help Requests for GM
Help Request Answers
1991 Buick Park Avenue 3.8L No Start VIN: 1G4CW53L0M
This vehicle came in for a crank, no start condition. I checked for codes and there are none present. Fuel pressure is at 50 psi KOEO. I have no spark and no injector pulse. I followed the diagnostic trouble tree that all data has for a crank, no start conditi...
1998 Chevrolet K1500 Cheyenne 5.7L Poor Idle Quality, Surge VIN: 1GCEK19R4W
New customer, unknown history, truck runs great above 700 rpm but idle will fluctuate 400 rpm have check fuel pressure, map, have installed know good maf, tp, and iac, checked trans range switch and showed in park, O2 sensors are both moveing good, Cmp retard ... Trouble codes: P0440 (Evap), P1631 (Theft)
1999 Chevrolet K3500 7.4L No Start VIN: 1GBJK34J7X
Thanks in advance for any help. Truck was towed in(from another shop) for a no start condition after a back fire. No codes, found I had no fire at plugs and replaced cap and rotor. Now I have fire but still no start. Checked fuel pressure and it was low (40psi...
2001 Chevrolet Suburban 1500 5.3L front vent outlet air temp VIN: 3GNFK16T71
i need to know what these temp sensors should be reading and how close the temp should be to the auto dial from the output temps
2004 Chevrolet Silverado 2500 HD LT 6.6L Excessive Emissions, Misfire
Hi. This duramax had a tuner (bullydog) and is overfueling off idle, knocking at idle sometimes and misses on number 7 at idle.. I recently repaired two injector connectors that were a little burnt on cyl 2 and 6. now it runs better at idle. Cylinder #1 has a ...
2005 Chevrolet Equinox LT 3.4L sets code c0035 VIN: 2CNDL63F85
Vehicle came in abs pump randomly coming on for no reason.sets code coo35 which is left front wheel speed sensor intermitent.checked wiring and connections for opens found no problems had a little play in hub so replaced hub assembly which as we all know has a...
2006 Chevrolet Tahoe Z71 5.3L Mechanical VIN: 1GNEC13Z46
Hello everyone, This Tahoe came in with a noise in the engine that sounds the same weather its cold or hot. It runs great, has no codes and no missfire history. It is pretty loud on the bottom so we pulled the pan off and inspected the rods and bearings, pulle...
2006 Chevrolet Suburban 1500 5.3L abs module
brakeline locations are not marked on abs pump. need to know what one is right rear and left rear? thanks
2007 Chevrolet Silverado 1500 Classic LT 5.3L not able to select 4wd VIN: 2GCEK13Z77
Vehicle came in not able to select 4wd high or low. no codes. checked out all the wiring and no shorts/open circuits. Automatic 4wd seems to work fine. Originally I could select the 4wd button and the tech 2 would show engaged. I took a module off another vehi...
2008 Chevrolet Impala LT 3.5L Surge VIN: 2G1WT58K18
2008 Chevrolet Impala with 3.5L. Higher engine rpm on deceleration( takes about 5 seconds after stopping the vehicle to return to a stable 650 rpm idle. desired and actual idle speeds agree, but in nuetral (or in gear) when vehicle reaches 2 or 3 mph, PCM comm...
2000 Oldsmobile Silhouette Premiere 3.4L MIL Lamp on VIN: 1GHDX13E2Y
I have a head scratcher here. Vehicle is setting a P0137 consistantly, under prolonged load, either climbing a hill or passing on the highway. There are no other codes and no driveablility concerns. In fact the vehicle runs great. The exhaust system is tight, ... Trouble codes: P0137 (Post cat o2 signal low)
1997 Pontiac Firebird 3.8L fuel level / gauge VIN: 2G2FS22K3V
Fuel gauge does not work after we replaced fuel pump. Of course we assume we caused this problem but prior to disassembly we are looking for any insight as to what went wrong.We reused the fuel pump bracket, it was hinged and when we removed the assembly from ...
2005 Pontiac G6 3.5L Brakes VIN: 1G2ZG528X5
Car came in with the complaint of brakes sticking,after test driving racked to find wheels would not roll. Checked for contamanation and found none. Opened one brake bleeder and pressure was released and all wheels unlocked.replaced master cylinder and fluid f...
2007 Pontiac G5 GT 2.4L Unknown VIN: 1G2AN18B57
Hi guys and thanks in advance for any help. I have a 2.4L '07 G5 with a noise. When you accerate ther is a rushing/sucking type noise only in drive. Does not make noise in nuetral while engine reved up only when engine loaded. Checked the chain and guides from...

Fixes & Summaries for GM
Fix/Summary Answers
2002 Buick Rendezvous CX 3.4L Drive Shaft VIN: 3G5DB03E32
Thanks all for the reply. Well, the fix is really in the differential and rear drive axle. too expensive to replace customer gonna have to live with it til it goes out. thanks :)
1999 Chevrolet K1500 Suburban 5.7L 2nd gear VIN: 3GNFK16R0X
Thank you all very much for your help. What I ended up doing is putting my computer from my suburban in and turing the key and watching the power from the light green wire. The light would stay on with my computer. Ignition switch is good. I bought a used comp...
2006 Chevrolet HHR LT 2.2L Unkown VIN: 3GNDA23D56
Thanks for all replies. Tim [...] hit it when he said grade vent valve on top of tank.Replaced fuel tank & now takes fuel at full volume.Thanks & more thanks.Bill
2007 Chevrolet Equinox LS 3.4L Starting VIN: 2CNDL13F57
Vehicle was towed to dealer to install new BCM and program. I had a new BCM sitting on the seat when it arrived, they thought the new one was already installed. They programmed the old one on accident and it fixed vehicle! I test drove the heck out of it to be...
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