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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for July 19, 2012
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Open Help Requests for GM
Help Request Answers
2004 Buick Park Avenue Ultra 3.8L left rear power window VIN: 1G4CU54164
This 04 buick will intermittently roll the left rear window down with no input from any of the switches. there is usually only one person in the vehicle at the time it happens and he knows that he is not accidentally hitting the switch. we have never been able...
2008 Buick Enclave CXL 3.6L Hesitation, Poor Fuel Economy VIN: 5GAEV23728
Ok it's your turn to help me. This customers complaint,is when you step on the gas to go from a stop, it will not accelerate. I road tested the car, and yes they are right, it does not accelerate when you start from a stop. hard throttle or soft throttle it ac...
1972 Chevrolet Corvette 7.4L Unknown VIN: 1Z67W2S508
Hey guys, we are considering replacing the POA Valve with an updated unit that converts it to "Cycling Clutch" type system so we can use R134a. Have less and less people around here that can service R12 systems. Is there any thing else in the system that needs...
1995 Chevrolet C2500 Suburban 7.4L Excessive Emissions VIN: 1GNGK26N0S
Need help guys. Car failed asm dyno smog test for nox. Linear egr can be commanded via scan tool on and off and will stall engine. During asm test, egr valve can be commanded to 75% and nox readings go from 1300-1500 to 100ppm. This tells me that ecm is not co...
1998 Chevrolet Corvette 5.7L Crank Pulley VIN: 1G1YY32G3W
Car came in with harmonic balancer separating which would seem pretty straight forward until I read the replacement procedure from GM. Since it's not keyed and outer shell has spun I'd like to know if there's any way I can be sure it will be back in balance. H...
2003 Chevrolet Avalanche 1500 North Face 5.3L Compressor VIN: 3GNEK13T03
Truck came in with A/C not cold enough. Evacute the system and found only 8 oz of freon. Pressure tested and found low side line leaking. Replaced the line and recharged the system. Compressor fired right up and everyhting worked perfectly. Shut the vehicle of...
2005 Chevrolet Colorado Z85 LS 3.5L wheel bearing VIN: 1GCDT13685
cust. compained of growl noisei in ft end. Itook it for a drive heard a bearig type noise from rf. could feel it in the floor board also on rh turns. Inspected ft end couldnt find any parts loose no play in bearings. Ran it in 4x4 couldnt hear any bearing nois...
2000 GMC Safari SL 4.3L Hesitation, Surge, Misfire VIN: 1GKEL19W5Y
Have a 00 GMC Safari that bogs down on hard acceleration. Only showing misfires on cyl 6 on my scanner. No Codes. Fuel Pressure 55- 60. Replaced fuel filter( was partially plugged). Replaced cap,rotor,coil,distributor. Vacuum stays steady on gauge. Any ideas w...
2008 GMC Envoy SLT 4.2L tractions lights come on VIN: 1GKDS13S28
Need some help with this one guys. Traction and service lights come on interm. Pulled codes and found c0455 set. Not to uncommon. Steering position showed erratic on scan tool so we replaced sensor. cleared code and roadtested. Alls great. Roadtested again and...
2001 Oldsmobile Aurora 4.0L Air Injection VIN: 1G3GS64C01
P1416 Secondary Air Injection Bank 2 Code comes back after a few days
2001 Oldsmobile Intrigue GLS 3.5L S belt
Need advice. Fixing a power steering issue with new rack, pump and pressure line. Took the rack out first released tension off belt then did pump and ran new pressure line. Went to put belt back on and the tensioner bolt hole broke off. Very, very,VERY bad des...
2004 Pontiac Grand Am SE1 3.4L Park Pawl VIN: 1G2NF52E54
Hello all. I have one that i believe is internal trans problem and believe that replacement of trans will be occuring but just want a little more input. This one was towed in for noise while driving and then customer stopped and shut off car, went to restart a...
2005 Pontiac Vibe 1.8L wheel bearing VIN: 5Y2SL638X5
customer came in back in 01/12 right front wheel bearing noise installed timken wheel brg & hub and aligned at that time new snap ring torqued to specs.miles then 159975! customer returned 05/12 wheel bearing noise rt frt again 162578 miles on veh could see ax...

Fixes & Summaries for GM
Fix/Summary Answers
2008 Buick Enclave CXL 3.6L AirBag Iight VIN: 5GAEV23708
Thank you all for the help. The customer has not experienced any driveability issues or warning lights since the vehicle left the shop. After recieving the TSB from GM and our inspection of the repairs we performed, they will go to the dealer if/when the airba...
1983 Cadillac DeVille 4.1L Excessive Emissions VIN: 1G6AD4787D
Hi every body, this Cadillac is finally fixed, we installed a different brand egr valve, a negative back pressure one, it took care of the nox issue. we want to thank every one of you who took some of their valuable time to send us those good tips, we are luc... Trouble codes: 52 (Ecm memory reset indicator).
1961 Chevrolet Corvair Truck 95 2.4L clutch VIN: 1R124S1175
To summarize: this beast has had a number of modifications. It seems common that an upgrade is performed on these with later style clutches and transmissions. What fixed it was to change out the disc,bearing (worn out),modify the rod and clutch cable linkage...
1995 Chevrolet Lumina LS 3.1L Stall VIN: 2G1WN52MXS
cleaned all grounds and car has not returned call to recheck on car and was told the problem has been working good Trouble codes: 36 (ic 24x sig error), 41 (est line error), 51 (ecm prom error), 85 (prom error), 87 (eeprom error), 21 (throttle position high).
1996 Chevrolet Impala SS 5.7L No Start, Stall VIN: 1G1BL52P9T
after 5th removal of tank, I went with a A/C Delco pump the Delphi is WRONG-all specs good and it runs like a champ.I guess outsourcing jobs doesn't pay off.Thanks of all of you who replied and I truly hope you all get the right part the fist time. Trouble codes: P0171, P0300, P0420, P1626.
2003 Chevrolet Malibu 3.1L No Start VIN: 1G1ND52J33
The ignition control module was not receiving 12 volts from the ignition switch. Replaced the ignition switch and all is well. Thank you everyone
1991 GMC C6000 Topkick C6H042 6.0L Surge, Cuts out VIN: 1GDG6H1P7M
Bushings on throttle plate rods were worn and egg shaped. These were supposed to be repaired when throttle body was rebuilt, but someone must have overlooked them.
2004 GMC Sierra 2500 HD SLE 6.6L Oil VIN: 1GTHC24174
Thanks Justin and Jake. Replaced leaking return line seals. Thanks to everyone else for their input.
2008 Saturn Aura XE 2.4L Fan 1 VIN: 1G8ZS57B78
First of all the dinosaurs reference was in relation to the Saturn brand being closed down by GM i.e. extinct. The fan turned on when it got hot enough by running the car for an hour in the shop. After talking to the customer a little bit more, the car was n...
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