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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for January 10, 2008
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Open Help Requests for GM
Help Request Answers
1996 Cadillac Fleetwood 5.7L crank hub VIN: 1G6DW52P7T
removed bolt but cant get hub off even tried heating it while using an impact on puller and an vibrating it with air hammer
2000 Cadillac DeVille DTS 4.6L Poor Idle Quality, Misfire VIN: 1G6KF579XY
hey, hoping for a push in the right direction. vehicle has a random miss at idle, can be felt thru the vehicle body and visually in the engine. have tested crank sensors with vantage - patterns strong and normal. checked the tsb related info on mitchell and re... Trouble codes: 1599 (stall or near stall condition detected)
2001 Cadillac DeVille 4.6L gauges abs air bag VIN: 1G6KE5Y41U
im getting code u1096 loss of comm. with insturment module. not alout of information in mitchell. ant ideas
2003 Cadillac Escalade ESV 6.0L heated seats VIN: 3GYFK66N13
Hello techs I have a problem trying to figure out why the heated seat on drivers side will not function properly. Push button, all light bars light up on buttons after 10 seconds sytem shuts off ,push again all bars flash once but thats it.Tech2 shows code b24...
1994 Chevrolet Camaro 3.4L clutch VIN: 2G1FP22S3R
I replace the clutch with an A/C Delco clutch kit and replace the leaking slave cylinder. I initially changed the slave and it shifted good. I replaced the clutch the next day when the customer approved the rear main and clutch. After replacing the clutch it w...
1995 Chevrolet Monte Carlo Z34 3.4L noshift VIN: 2G1WX12X59
rebuilt trans will not shift 1 or 2 but you can manuly shift put shifter in 2 and shift 3 and 4 i am thinking bad ecm but i wonder if any techs have ever seen this problem please help thank u
1996 Chevrolet K1500 Cheyenne 5.7L No Start VIN: 1GCEK19R1T
Hi all This chevy pu was towed in as a no-start. Cranks fine but kicks against starter like timing is to advanced. The plug foul with fuel almost imediately. Hooked a scanner on and it shows ECT at -40 degree, IAC -[...], and TPS 0 vol...
1998 Chevrolet Blazer 4.3L reverse VIN: 1GNDT13W6W
This one was brought to me by a trans shop who just built the transmission. after install the vehicle has no reverse. The position indicator will not light the reverse light and the scanner doesn't say it is in reverse. If you play aroud with it and ever get t...
2000 Chevrolet Cavalier 2.2L cooling system VIN: 1G1JC5242Y
OK, cust. took vehicle originally to another shop for overheating concern. They replaced thermostat. Car was still overheating, they replaced thermostat again telling him they suspected defective thermostat. Car still overheated. The other shop told them they ...
2003 Chevrolet Suburban 1500 LT 5.3L MIL Lamp on, Lean Condition VIN: 1GNFK16Z63
After replacing uel pump and filter, vehicle came back with same codes. LTFT is 11% bank1 and LTFT is 13% bank2. Checked for vacuum and is good (18hg") Truck has no misfire. No TSB's and Did the whole troubleshooting tree according to Mitchell. Everything Chec... Trouble codes: P0171 (Always Lean Condition Bank 1), P0174 (Always Lean Condition Bak 2)
2004 Chevrolet Impala LS 3.8L Electronic VIN: 2G1WH52K84
This car came to us with a really bad electrical burn smell, which seems to be coming from the vents, i pulled the blower motor out and the smell was vey bad in the blower motor it self. So a new blower motor went in and now the customer is saying the smell is...
2004 Chevrolet Silverado 2500 HD 6.6L Heater VIN: 1GCHK23234
Hey all. This one I think is a possible blown headgasket, but have not been able to verify it yet. An intern at our shop performed a flush on the cooling system of this truck. The next day, the owner brought it back for a complaint of no heat and low coolant l...
2007 Chevrolet Silverado 1500 LT 4.8L Relearn VIN: 1GCEC14CO7
Help, I did a simple tire rotation and attempted to "Relearn the tire position" through the Drive Information Center(DIC). I entered the relearn and let air out of the Drivers front tire, Nothing happened. The book said 5 seconds or until the horn chirped, so ...
1995 Geo Metro 1.0L Mechanical VIN: 2C1MR2261S
Hi One Of my customer has this Chvey Geo With an 1.0 that is all worn out. He has a chance to by another same year wreck Geo with an 1.3 with an good motor. My question is that will the 1.3 go into the 1.0 Geo ?
1991 GMC Sonoma Syclone 4.3L spark knock VIN: 0152461943
Not sure if I am expecting too much from this truck or not, reading alot of reports about spark knock being normal in these trucks. This truck has heavy spark knock under WOT conditions. Truck came to me with antifreeze in oil, removed cylinder heads found h...
1993 GMC K1500 Suburban SLE 5.7L Excessive Emissions, MIL Lamp on VIN: 1GKFK16K5P
code 32 present followed flow chart and passed solenoid and ecm. egr not opening at cruise speed, egr valve was replaced even though checked out fine. problem still occured at idle with vacum pump unable to open valve. open valve by hand and can stall engine. ... Trouble codes: 32 (egr system failure)
2003 Hummer H2 6.0L Misfire VIN: 5GRGN23U83
this hummer look simple 6.0L, but i can figure out, i have miss fire only on bank 2, 2,4,6,8, have miss count, we been try put new spark plug, intake manifold gasket, it won't help, the injector test our good, have good blink , and good spark every cylinder, c... Trouble codes: P0300, P0101

Fixes & Summaries for GM
Fix/Summary Answers
1996 Buick Skylark Custom 3.1L Theft light VIN: 1G4NJ52M4T
Replaced instrument panel and vehicle is fixed. I would have liked to try the Tech 2 bidirectional controls and shut off the system but I have none available to me. Thank you all for your responses, I'm afraid we will all have to live with these systems for so...
1998 Buick Century Custom 3.1L wipers VIN: 2GAWY52M9W
The fix for this problem was replacing the new circuit board for another new circuit board, tried to do pinpoint tests as per the alldata but didn't work out as when they ask you to disconnect c201 connector while wipers aren't stopping to determine if cause i...
1998 Buick Park Avenue 3.8L flywheel VIN: 1G4CW52K8W
I would like to thank the many replies about the PCV system. No one to my knowledge had been there recently, but when I removed the housing there wasnt even a PCV valve in it. Put a valve with o rings in it and the whistle went away. Thanks guys
1998 Cadillac Catera 3.0L radio,locks,dome VIN: W06VR52R3W
it was the fuse . just missed it ! no other problems thanks again.sorry for delayed post
1997 Chevrolet Astro 4.3L Misfire VIN: 1GNDM19WXV
AFter more road testing with a fuel pressure guage attatched, the van would loose 4 psi of pressure just before the misfire occurred. We replaced the fuel pump with a new A/C Delco module assembly. This fixed the misfire at speeds after running for 20+ miles.
1998 Chevrolet Venture 3.4L Cooling Systems VIN: 1GNDX03E6W
After discussing options with customer we decided to put in a factory thermostat, because there was no pressure loss in cooling system and no proof of bubbling through the coolant. After test drive it once again overheated and had constant bubbles coming thro...
2002 Chevrolet Avalanche 2500 8.1L No Start VIN: 3GNGK23G42
all in all it was found to be a faulty replacement new part from the dealer the scope pattern for the sensor look good and strong but the voltage was 2 volts short not allowing the computer to see the on off signal replace the crank sensor again and it started... Trouble codes: P0335 (crank sensor ciruit a fault).
2005 Chevrolet Express 1500 LS 5.3L Transfer Case VIN: 1GCFH15T95
Thanks for the responses. The responses I got were to check the driveshaft bottoming in the shaft and binding on splines. These were not the case, and I at this time am assuming it to be a weak spot in these transfer cases. I have replaced the transfer case an...
1996 GMC K2500 Suburban 7.4L Starting VIN: 3GKGK26J9T
Customer did not want to authorize injector repair, this is closed with update if customer returns to continue the diagnossis. I would like to say thank you to the 12 techs that replied almost imediately. Thanks to Tom [...] for his tip on waiting for som...
1999 GMC Safari SL 4.3L code VIN: 1GTDM19W0X
Well,thanks for all the replies. The van appears to be fixed.I had to reprogram several times to get it done .
2001 GMC Yukon SLE 5.3L Poor Idle Quality VIN: UNKNOWNATT
thanks again to all who replied. i cleaned throttle plate truck runs great. i printed out the tsb 04-06-04-040 for the customer just to prove the truck actually had two problems. once again thank you for your knowledge.
2001 GMC Sierra 2500 HD SL 8.1L No Start VIN: 1GTHK29G51
Thank you all for the responses. The truck belongs to my son, so I didnt get the opportunity to try the relearn procedures right away. I didnt have a check engine lite issue so I am not sure which procedure had an effect if any. I performed all the different m...
2001 GMC Sierra 1500 SL 4.8L Differential VIN: 1GTEC14V11
thanks for all the great replies . still waiting for customer to decide what he wanted to do . im gonna close this help request so so it doesnt go for too long . thanks again
2004 GMC Envoy XL SLE 5.3L air springs VIN: 1GKET16P14
Hello evryone. I didnt got any good help, but we have figure this one out alredy. There is no reset in that system, only calibration there is on sensors. Problem we had that when we removed rear end , somehow l/r sensor had moved to oposite side. So air compr...
1999 Pontiac Grand Prix SE 3.1L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, Poor Fuel Economy VIN: 1G2WJ52M3X
Thanks for all of the help messages on this one! Unfortunately, when I was done pulling and reinstalling the module and coil packs it ran fine and the customer took vehicle and hasn't had a problem yet. I don't know if it was a poor connection or one of those ... Trouble codes: P1106 (MAP sensor ckt. intermittenly high).
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