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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for November 15, 2007
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Open Help Requests for GM
Help Request Answers
1998 Cadillac DeVille 4.6L hard start VIN: 1G6KD54Y4W
Hello everyone, I bought this car from an auction and have no history on its repair history. When i first got the car it had several numbers flashing in the message center. I have a friend that works at cadillac but he has been able to answer my question. the ...
2005 Cadillac CTS V 5.7L MIL Lamp on VIN: 1G6DN56S95
Hello techs The engine has prolonged start w/ P0343, not erasable. Cam sensor was replaced by another shop before. Removed upper intake, replaced sensor w/ ACDelco part from diff. places two times. There is no pulse at the signal wire while cranking the engine... Trouble codes: P0343 (CamShaft CMP sensor curcuit high voltage)
1998 Chevrolet Astro 4.3L abs VIN: 1GNEL19W7W
The Customer came in stating the ABS light came on.I scanned the ABS system and code C0226 LF Wheel Sensor Signal Missing. I installed a new wheel sensor and went to drive it. The first thing I noticed is that all the wheel sensor pids read 3 MPH and the brake...
2001 Chevrolet Express 3500 6.5L fuse #18 keeps blowing VIN: 1GCHG39FX1
van came in with abs light on,cruise inop,after testing found fuse #18,10 amp brake fuse in under dash fuse panel blown,replaced fuse,light went out,cruise works,roadtest,all ok,next day customer came back, fuse blown again & same symptoms,short not present,re...
2004 Chevrolet S10 LS 4.3L RDS Radio VIN: 1GTDT13X14
Good morning, all; Two days and 2 techs later, have exhausted everything we know to do in trying to resolve this problem... We are an independent used car dealer/ repair shop, and have some experience in installing and configuring replacement GM factory radi...
2005 Chevrolet Impala 3.4L No Start, without foot on gas VIN: 2G1WF52E95
This one has me stumped. When cold, it will either start/stall or not start at all unless you give it a little throttle. Once you give it throttle and it starts, it runs fine. When it warms up it starts fine. Fuel pressure is right on, temp sensors are good, M...
1994 Oldsmobile Achieva S 2.3L timing cover oil leak VIN: 1G3NL1537R
I do and usually practice no silicon with ruberized gaskets but had to try after 2 trials.
1996 Oldsmobile 98 Regency Elite 3.8L Stall VIN: 1G2B123456
This OLDS will stall very intermittenly. Then it will not start for about 2 hours, then runs fine for days until it acts up again. I personally have not got it to stall for me. Tested fuel pressure, and it is in specs. Also lab scoped fuel pump, looks good. Re...
2000 Pontiac Grand Am SE 3.4L Cuts out, Stall
Hey Guys and Gals, Got a cam sensor code on a 3.4 and haven't seen this before, performed the trouble tree from GM for the code and fixed 3 bad spark plug wires but the sensor seemed to be working OK. I looked at the tech 2 and had Cam sensor signal present. T... Trouble codes: P0341 (Camshaft Position Sensor Performance)
2001 Pontiac Bonneville SE 3.8L Ignition VIN: 1G2HX54K81
Just received this Bonny with an intermittent start issue. I "think" I have a 50/50 shot here...either the ignition switch or the pass key cylinder. It has full power...instruments, radio, lights, etc. Occasionally when the key is turned to start there is noth...

Fixes & Summaries for GM
Fix/Summary Answers
1994 Cadillac DeVille 4.9L Heater VIN: 1G6KD52B1R
i flushed the heater core again and got CRAZY with the flush gun pressure...huge improvment!! im sure the best repair is core replacment!! thanks to all that replied!!
1996 Chevrolet Blazer 4.3L transfercase VIN: 1GNDHFYRRM
thanks for all the help i opted to remove the transfer caes and install a used one for the price of the parts and time to get into the case i found a used transfer case cheep and that fixed the problem
1999 Chevrolet Tahoe LS 5.7L Hesitation, Cuts out, Misfire, MIL Lamp on VIN: 1GNEK13R1X
Thanks for the help guys. Found a bad wire going into the ignition module. It seemed so much like a bad crank sensor even though I couldn't get it to act up on the scope. I finaly decided to trace the wires from crank sensor back to the ignition module and ... Trouble codes: P0300.
2002 Chevrolet Blazer LS 4.3L low pedal VIN: 1GNDT13W72
2004 Chevrolet Silverado 1500 4.8L Starting VIN: 1GCEK14V94
Thanks all for your input, especially those of you suggesting voltage drop. Electrical is sometimes a monumental task to diagnose and usually fairly simple to fix. It ended up being a faulty distribution panel (under the hood). That 15 amp pcm 1 fuse that wasn...
1995 GMC C3500 Sierra SL 6.5L Surge VIN: 1GTHC39F8S
Most everybody pointed to the injector pump which ended up being the problem.I couldnt really get any good diagnostic procedures for the injector pump best way i found to troubleshoot it was to eliminate everything else and talk to techs with experence with t... Trouble codes: 35 (inj pulse width error short response).
2003 GMC Savana 1500 5.3L MIL Lamp on VIN: 1GDFH15T93
Well,right after getting the first reply we switched o2 sensors side to side in hopes of the light coming back on with the other code.The light hasn't come on at all. Due to having to close the help request in time I can't say it's fixxed but switching the sen... Trouble codes: P0174.
1997 Pontiac Sunfire SE 2.2L No Start, MIL Lamp on VIN: 1G2JB524V7
found metal in the oil this was so this was enough to recc a timing chian but the custumer did have the $$ to go into the timing chian cover. Trouble codes: P1601 (pcm serial comm or ecm overtemp), P0300 (random cylinder misfire), P0440 (evap emissions system fault).
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