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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for November 29, 2006
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Open Help Requests for GM
Help Request Answers
1996 Buick Regal Custom 3.8L tape player VIN: 2G4WB52K6T
The factory cd/ tape player has an error code of 10 when a tape is installed, does anyone know what this means and is there a repair that can be done by us or does the radio need to go in for repair. All other features of radio work fine, including the cd play...
1991 Cadillac DeVille 4.9L heat VIN: 1G6CD53B7M
this thing came in no heat again, heat hoses not getting hot ok, checked flow seemed very low, pulled heater core to check for restriction ok, reinstalled heater core left access cover off and ran vehicle to operating temp heater core ice cold ok, pulled water...
1994 Chevrolet K1500 Suburban Silverado 5.7L heater VIN: 1GNFK16K4R
help gm techs! we have a customers "other" vehicle in and we dont do a lot of gm. the customer had a leaking radiator- we replaced it and noticed when done there was no heat from both cores. customer stated problem occured a week ago but was ok up to that poin...
1995 Chevrolet K2500 Cheyenne 6.5L Excessive Emissions, Cuts out, MIL Lamp on VIN: 1GCGK24F4S
Diesel guys, I have an intermittent problem with this truck. When it is acting up it will be idling normally and will just shut off (no stumble,just like the key was shut off). You can immediately start it back up with no problem, then a minute later it will ... Trouble codes: 19 (crank sensor fault), 18 (pump cam reference pulse error), 17 (high resolution sensor fault), 35 (inj pulse width error short response), 54 (tio fault), 65 (accel pedal position fault)
1997 Chevrolet Astro 4.3L drl VIN: 1GNEL19W6Y
cust came in with fuel gauge and headlts flickering--scoped fuel gauge-no problem found w circuit-will rec cluster--however only 11.2 volts found at headlts/ .15 drop on ground circuit. jumped relay and still same voltage however fuse to relay remains at 13.7 ...
1998 Chevrolet Corvette 5.7L Unknown VIN: 1G1YY22G6W
Someone please help me!!! This vette is driving me crazy and I cant figure it out. The original problem that it came in for was the SERVICE VEHICLE SOON message was being displayed in the dash. I found 2 codes for the door control module but everything in the ...
1998 Chevrolet Tahoe 5.7L Poor Idle Quality VIN: 36NEK18R4W
Greetings: We have a Tahoe that runs good on the road but misfires at idle and sets 1 code for #6 misfire. We have put in new plugs, plug wires,air+fuel filters and a new injector on cylinder #6. Performed a decarbonization treatment and confirmed a good fuel ...
1999 Chevrolet Silverado 2500 6.0L Hesitation VIN: 1GCGK29U0X
This truck came in with a symptom of crankcase oil level increases over time. The customer had a oil sample analyisis and it showed that the oil was diluted with fuel. The truck runs OK with the exception of a slight hesitation when cold.The only code is for t... Trouble codes: P0463
2004 Chevrolet Silverado 2500 6.0L headlight VIN: 1GCHK29U04
Got a wierd one here, the vehicle came in for not turning off with key. You can shut the key off and disconnect ignition switch and it will stay running until you turn on the headlights. It will die instantly. Came in about a year ago with the wiring harness g...
1995 GMC K1500 Sierra SL 5.7L Mechanical VIN: 2GTEC19K15
under regular load from starting off once vehicle gets going i here a loud screeching noise or gear noise, in either trans or transfer case, let off gas goes away, drive very , very gentle seems fine once load like a regular take off noise comes in vehicle dif...
1992 Pontiac Grand Prix GT 3.1L fuel gauge VIN: 1G2WP14T7N
What's up fellow IATN techs. I got this car from one of the mechanics from our other affiliate shop. The complain was the fuel gauge is reading inacurate. The gauge is reading full but the idiot light for low fuel is on. So they replaced the fuel gauge sending...
1995 Pontiac Trans Sport 3.8L Cuts out VIN: 1GMDU06L1S
Thanks in advance. Customer is complaining of an intermitant cutting out (not stalling) It has a very intermittant check engine light with no codes. I am leaning to a bad crank sensor but i was looking for some input. Thanks Mike P

Fixes & Summaries for GM
Fix/Summary Answers
1999 Buick Regal LS 3.8L Hesitation, Surge, Cuts out, Stall VIN: K5X1577536
After I poked around I found that all tests were ok so I threw another set of plugs at it and wires and fixed it thanks for help friends.hope turkey day was great and happy holidays.
1995 Chevrolet Caprice Classic 5.7L Stall, Misfire, MIL Lamp on VIN: 1G1BL52P4S
this car had two problems first the miss fire at start up and the code 18 was the ignition mod. the stalling problem was the ignition switch. thanks for all the help Trouble codes: 18 (injecter circuit fault).
1995 Chevrolet K1500 Cheyenne 6.5L Stall VIN: 2GCEK19SOS
Sorry for sitting on this for so long,was waiting to hear back from the customer,to verify the fix.I havent heard from him so no news is good news.The overwhelming consensus on this truck was the PMD,thanks especially to Roger from Alberta who put me in touch ... Trouble codes: 36 (inj.p/w long response), 35 (inj.p/w short response), 32 (egr sytem problem), 44 (egr p/w error), 49 (serv. throttle soon lite error), 57 (pcm 5 volt shorted).
1997 Chevrolet Express 1500 5.7L No Start VIN: 1GTFG15RXV
Hello Techs,thanks for all the help!!,after checking al the suggestions and 1.5 days I took some fuel [it smelled good] and lit it on fire it burnt but not very good,so I took some fuel from my yerry can and did the same thing,that was a big diffrend! ,talked ...
1998 Chevrolet Monte Carlo Z34 3.8L Engine Fire VIN: 2G1WX12K7W
I have received many replies on this post and I thank you all so very much for replying. Most of you said the fuel pressure regulator and i believe that was the cause, however the customer contacted his insurance company and they totaled the car, so I never go...
2000 Chevrolet Silverado 1500 4.8L No Start VIN: 1GCEC19V3Y
OUTSTANDING!! This is how you guys make me feel. Virtually everyone hit the nail on the head. I have had previous fuel regulator complaints that were total failures but this time when I removed the vacuum hose there was no fuel smell nor any sign of leakage so...
2001 Chevrolet Tracker 2.0L MIL Lamp on VIN: 2CNBJ13C11
i was a little surprised at the lack of responses to this post. i do appreciate the3 replies i did get though.what i found was the fuel tank pressure sensor would glitch out and go open.the car did come back 5 days later mil light but it had a knock sensor fai... Trouble codes: P0440.
2004 Chevrolet Silverado 2500 HD 6.6L Brakes VIN: 1GCHK23104
Test drove and watched scanner for front wheel speed sensor mph, they were reading properly. Inspected all brakes and wheel bearings, good. Found that while watching scanner the abs motor would cycle when vehicle was almost stopped. Using scope found that the ...
2000 GMC C3500 Sierra SL 6.5L No Start VIN: 1GDKC34FXY
Thanks for the help. Replaced PCM and corrected communication problem and engine running. I was not loosing voltage to the ESO solenoid when the truck would not run. So, that told me from your information that my theft system module had nothing to do with the ... Trouble codes: U1255 (No communication on serial data line).
1990 Pontiac Grand Prix LE 3.1L Excessive Emissions, Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, Poor Fuel Economy VIN: 1G2WJ54T5L
Hi It ended up being all the coils were bad. I had replaced one of them and the other two had good spark. I would start it up and it would do the same thing. The coils were intermittent which threw me off. Thank for all the replies. jim
2002 Pontiac Aztek 3.4L battery light VIN: 3G7DB03E72
we check all powers and cleaned all grounds and found no faul and tested wires from alternator to pcm checked okay and check all the pins on intrument cluster the all okay customer got a used intrument cluster and we put it in and the problem did not return th...
2003 Pontiac Bonneville SSEi 3.8L Accessories VIN: 1G2HZ54143
this had nothing to do with taking out the cluster.but we sent the cluster out to custone in whitby and exchanged for a rebuilt unit for 285.00 canadian dollars this included the shipping.anyway thanks for the help. why did they go l.e.d backlighting i will ne...
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