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Prev Professional Automotive Repair Technical Discussions for January 26, 2011
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Open Help Requests for GM
Help Request Answers
2000 Cadillac Escalade 5.7L No Start, Hesitation, Stall, Melts coil VIN: 1GYEK13R6Y
Now two coils replaced and two ignition modules replaced, sets code p0315 intermittently after module fry's. Good voltage and square wave coming from PCM to module. Coil power and ground all good. We are currently out of ideas after testing all known wiring an...
2008 Cadillac CTS 3.6L MIL Lamp on VIN: 1G6DR57V78
Happy holidays, We have this caddy that very intermittenly sets the code p2097, We have tryed to get this car to set this code on us, but no luck. At times will take a week to come back, have monitered all data on road and no other codes set, fuel trim bank 1 ... Trouble codes: P2097
2001 Chevrolet Impala 3.8L Cooling Systems VIN: 5456466544
Vehicle came in for low coolant light. Coolant looks like normal nasty dexcool sludge. Customer is unreachable to find out if they keep adding coolant or not. I took it upon myself to pressure test cooling system. Pumped up to 15Lb and drops down to zero in ab...
2002 Chevrolet Silverado 2500 HD 6.6L MIL Lamp on VIN: 1GCHK23122
Greetings all. I have a Duramax that is being particularly honery. It will intermittantly set a MAF code P0101. Freeze frame data is as follows... Engine RPM 681, Coolant Temp 147 degrees F, Vehicle speed 1 mph, Intake Air Temp 106 degrees f, MAP 25.40 iHg, MA... Trouble codes: P0101 (MAF Range performance)
2003 Chevrolet Silverado 2500 HD 6.6L MIL Lamp on VIN: 17E3146310
Ok, loads of fun,cust. came in wanting glow plugs replaced, replaced and next day cust. called and said the ck eng light was BACK on, they said thats why they wanted them replaced, anyway, this is a calif system and my voltage is at 1.2v which NORMALLY means t... Trouble codes: P0380
2003 Chevrolet Avalanche 1500 Z71 5.3L Surge, Cuts out, MIL Lamp on VIN: 4545A06893
Hi guys I have a Chevrolet Avanlanche 2003 it cuts out on load about 25% of load when it's hot (in close loop). It's the same that if i shut off the key and i come on. I have 2 codes P0101 Mass air flow performance and P0300 Random missfire. I have changed 2 ... Trouble codes: P0101 (Mass Air flow performance), P0300 (Random missfire)
2004 Chevrolet Tahoe Z71 5.3L No Start VIN: 1GNEK13Z44
Cust brought vehicle in due to a no start problem. She said she had to open the throttle or "pump the gas" to get it started. Of coarse the truck has not failed at all since we have had it. All readings are normal at this time. The only code in the pcm is p017...
2004 Chevrolet Tahoe LT 4.8L Poor Idle Quality, MIL Lamp on VIN: 1GNEK13V64
Thanks in advance for your help. Please read related history and repairs before replying. This is my bosses truck and we are at a loss. It misses only at idle, runs great going down the road. It is missing mostly on Cyl. #1 and slightly on #8. You can watch it... Trouble codes: P0300 (Random cyl. misfire)
2006 Chevrolet Malibu LS 2.2L No Start, Stall VIN: 1GZT51F86F
The customer told me this vehicle had stalled & would not restart intermittently. After they let it sit for a while it restarted. I have not yet duplicated this condition. I scanned the codes & I had history codes P0506 & 120. I checked the failure records for...
2007 Chevrolet Suburban 1500 LTZ 5.3L Noise VIN: 1GNFK16327
After previous repairs all noises gone except for a rattle when driving down road hitting bumps. I have reinspected front end and can find no loose parts. I found a tsb for noise in front due to struts leaking and strut bumpers being to tight. I replaced the s...
2002 GMC Sonoma SL 4.3L MIL Lamp on VIN: 1GTCS19W02
Trying to get information, about what running fuel pressure should be and if there has been many common complaints in this area Trouble codes: P0171 (p0174-), P0174 (testing and results)
2003 GMC Yukon Denali XL 6.0L No heat VIN: 1GKFK66U43
Ok so heres why ive got a headache...Thank you all in advance! Ive got this 03 gmc yukon xl 6.0l that has an issue with the heat. The cusomer orginally brought it in for a coolant we went ahead and flushed out the old junk and in with the new stuff. ...
1996 Oldsmobile Cutlass Ciera 3.1L fuel dilivery VIN: 1G3J55M2T6
towed vehicle in to shop that had quit running wyle it was driving down the road. vehicle starts but after 5 senconds stalls ,did fuel check got 45 pds.spray with starting fuel and remains running , no codes present ?? any ideas
2000 Pontiac Grand Prix GTP 3.8L Stall VIN: 1G2WR1215Y
I've been having an issue with this vehicle since replacing the fuel pump resistor. Intermittently the vehicle will start/stall just like the resistor has gone bad again. Initially I found the connector from the resistor to the vehicle harness was melted and w...
2000 Saturn SL1 1.9L monitors VIN: 1G8ZH5283Y
Hello everyone, Here I am once again asking for help on anothers behalf. It's starting to sound like a my best friend who is actually me type story but it isn't. Anyway, they have a Saturn that won't run system monitors. It has driven several hundred miles and...
2007 Saturn Vue 3.5L PPS(Pass Presence System) VIN: 5GZCZ53447
Customer stated that SRS light would come on after a 20 minute drive. Customer also said that if he turned on the "pass seat heater"(front pass seat) that light would go out. When we first got it the SRS light was on and the pass seat heater switch was pushed ...

Fixes & Summaries for GM
Fix/Summary Answers
1998 Buick Park Avenue Ultra 3.8L battery VIN: 10002XT578
Hello found the draw it was the amplifier for the stereo in the trunk. Thanks for the help especially the person Who provided me with the wiring diagram! Sorry your name slips my mind its been a while!
1997 Chevrolet K1500 Cheyenne 6.5L Surge, Cuts out, MIL Lamp on VIN: 1GCEK19S6V
I just told the rebuilder that it had to be the injection pump and after all the testing they agreed to send me another one, and problem solved, man did i waste the time assuming the part was good cost a lot of time. Trouble codes: P1214 (TDC offset).
1999 Chevrolet Silverado 1500 LS 5.3L No Start, Poor Idle Quality VIN: 2GCEK19TXX
Sorry it took so long to post this but we wanted to wait and see if truck was fixed. Thank you for all your help and suggestion,it turned out to be bad upstream o-2s. Even though they show good.Replace with new and truck ran fine Thanks Again Trouble codes: P0171, P0174.
2002 Chevrolet Silverado 2500 HD 6.0L Misfire VIN: 1GCHK29UX2
This one is fixed, after checking secodary voltage and patterns and not seeing anything obvious we decided to try switching plugs and wires to different cylinders and the misfire moved with it.a new set of plugs and wires and misfire went away. Trouble codes: P0300 (Random misfire).
1998 Pontiac Trans Sport 3.4L PRNDL Input VIN: 1GMDX03E9W
Customer hasn't responded to approve fix yet because of other issues with van. When this happens I will update at a latter date. Thanks to all the responses.
2002 Pontiac Bonneville SE 3.8L Unknown VIN: 1G2HX54K92
Unbelievable!!! I tried to start this vehicle at least 2 dozen times in the last day and a half. It started every time. After reading your replies, and cusulting with the owner, we decided to install a signal light at the starter wire. Thgat way he would k...
2000 Saturn LS2 3.0L Oil Cooler VIN: 1G8JW52RXY
Well never did find a R&R for this but thanks to Andrew [...] got the info I needed and got it out of there! It is underneath the lower intake. Not that bad of a job considering it calls for 4.8 hrs in my book.
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