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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for March 10, 2009
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Open Help Requests for GM
Help Request Answers
1999 Cadillac Seville SLS 4.6L torque convertor clutch VIN: 1G6KS54Y2X
Vehicle came in with check engine light on. Fault code P0741 for tcc stuck off. Checked transmission fluid level, good. Test drove, no aparant shifting problems. Have not checked the slipping of the tcc yet. Wanting to know if there are any known faults with t...
1989 Chevrolet Corvette 5.7L headlamp circuit, high beam side VIN: 1G1YY2184K
1989 Corvette with headlight/fog light problems All, 1989 Corvette thatís getting 7 volts of power on the high beam circuit (green wire) when the fog lamps are turned on with the headlight switch in the first position (for the running lights). Consequently t...
1995 Chevrolet winnebago 7.4L Hesitation, Surge, Misfire, Power Loss VIN: 1GBLP37NXS
Vehicle is a 35ft winnebago but with GM guts. 7.4L TBI. Problem is no power on inclines, sometimes popping, vibration. Found hevy corrosion inside distributor at base, so I replaced that with coil and cap. Rotor looked in great shape. engine runs better with n...
1996 Chevrolet Lumina 3.1L Poor Idle Quality, Cuts out, Stall, Misfire, MIL Lamp on VIN: 2G1WL52M8T
P0306 with a flashing SES lamp after vehicle is driven 20 miles or more rough idle is constant. At the onset of the problem the vehicle will shake violently under acceleration and at times die but will restart. Coils have been checked and resistance is equal o... Trouble codes: P0306 (6 misfire)
1998 Chevrolet Blazer 4.3L transfer cas
sorry for no vin, forgot to get it. will not go into 4x hi but will switch to 4x low, if i select the 4x hi button it will switch back to 2 hi, cannot get into tcm w/genisis no comm. i had seen some posting of bad switches but not with no comm. from the scanne...
2000 Chevrolet Tahoe 5.7L Parking brake VIN: 1GNEC13T1Y
HI Y'ALL !! Got this POS 2000 Tahoe, the parking brake dont hold. I have adjusted the cable to the MAX. I have even tried to add spacer to the adjustment bar. I dont have a rack until tomorrow to pull wheels. Has anyone had this kind of problem??? They call th...
2002 Chevrolet Impala LS 3.8L MIL Lamp on VIN: 2G1WH55K22
this code keeps coming back before we warranty the converter has any one else been having this problem when the cat wasn't the fix? should we try another update? Trouble codes: P0420
2003 Chevrolet Tahoe LT 5.3L headlights VIN: 1GNEK13Z23
Vehicle came in, customer complained about headlights flickering, interior lights flicker, and dash lights flicker. After the 4th time in, the problem finally showed itself. Have checked all grounds, reflashed ecm, removed dash cluster to check for loose wirin...
2004 Chevrolet Silverado 2500 HD 6.6L heater VIN: 1GCHK23104
This truck works perfectly except for one thing. Very poor interior heat, regardless of whether on the highway, in traffic or at idle. Keep in mind, I'm located in Calgary, Alberta, Canada. It's approx. -20C today here. I've driven and fixed several other tru...
2005 Chevrolet Suburban 1500 LS 5.3L 4WD Shifting VIN: 1GNFK16Z65
Customer complains transfer case will intermittently go into neutral (she said she didn't even know it had one)yet its still driving normally. Sometimes while turning will feel like the 4wd is binding even though itís in auto 4wd, seems to be ok in 2wd. Now th...
2005 Chevrolet Silverado 1500 LS 5.3L 4wd lo VIN: 2GCEK13T95
I have this truckk that came from a Ford dealership. Upon inspection of the 4WD system I have found no codes stored or current in the system. The truck will operate corretly when the 2WD or the 4WD HI is selected. When I try to engage the 4WD LO the light will...
1999 GMC K1500 Suburban SLE 5.7L transfer case VIN: 3GKFK16R9X
Howdy there, got this suburban that is making a clicking noise at low speeds, coming from the transfer case, same noise forward or reverse, seems to go away in 4wheel drive, dont think its the chain. I was wondering if there is a problem with the front snap ri...
1992 Pontiac Bonneville SE 3.8L No Start VIN: G2HX53L6N1
AT the end of my rope, any help greatly appreciated. Vehicle came in for noisy starter motor, disconnected battery and replaced starter. Starter has only a battery cable and a solenoid wire, no other wires. No start after starter installation, removed starter ...
1997 Pontiac Grand Am SE 2.4L theft VIN: 1G2NE52T2V
theft light flashs,dies right after start up. all other gms, other then grand ams, i put in a new ing switch and send them. 1st grand am that came in with theft i looked up what to due and how to test, past all tests, like all theft problems due. found most co...
1999 Pontiac Grand Prix GT 3.8L Misfire VIN: 1G2WP52K8X
missfire at idle code p0300 most evident at idle cylinder 4 missfire showing on scanner in the thousands. checked the above stuff all seems ok .just want secound opinion. thanks for the help in advance. Trouble codes: P0300 (random missfire)
1999 Pontiac Grand Prix GT 3.8L Misfire VIN: 1G2WP52K8X
missfire at idle code p0300 most evident at idle cylinder 4 missfire showing on scanner in the thousands. checked the above stuff all seems ok .just want secound opinion. thanks for the help in advance. Trouble codes: P0300 (random missfire)
1999 Pontiac Montana 3.4L all gauges VIN: 1GMDX03E1X
hi everyone, this van came in with all gauges frozen.found ign 1 fuse (located on right side panel of dash)10 amp blown.isolated problem to be underneath top up dash panel.removed dash & wiggle on some wires and got a good response on my ohm meter.the problem...

Fixes & Summaries for GM
Fix/Summary Answers
1997 Buick Park Avenue Ultra 3.8L converter VIN: 1G4CU5215V
Thank you for all the info gave customer the option of replaceing tcc solinoid and performing tsb or serviceing the trans and adding some trans x. well typical customer opt for inexpensive fix right now but did seem to help thank you again
1991 Chevrolet V3500 Silverado 6.2L trans VIN: 1GCHV33N3M
Hi everyone.Thanks so much to everyone who responded to my request.I am going to drive this truck until something goes wrong in the trans then I will deal with it at that time.Applying all the info and advice I have received should make for an easy decision.Th...
2000 Chevrolet K3500 5.7L wont shift into 4th gear at times VIN: 16BJK34R6Y
Thank you again for everyones help, I pulled trans out replaced converter while I had trans pan off I replaced 1/2 shift solinoid combination of both fixed my issue Thanks all
2001 Chevrolet Suburban 2500 LT 6.0L Passenger Side VIN: 3GNGC26U71
Thank You all for the sound detailed advice to repair the air leak in the HVAC intake plennum. I peaked under the cowl with out removing it and did not notice the panel. Great advice was to take your time to cut and remove the sealer all around the accsess p...
2003 Chevrolet Avalanche 1500 5.3L fuel gauge VIN: 3GNEC13T93
2005 Chevrolet Silverado 1500 LS 5.3L different motor VIN: 2GCEC13T15
1997 GMC C1500 Sierra SL 5.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: 2GTEC19R8V
I had to replace the spider injection system on this vehicle which is Vortec. The fuel regulator was leaking gasoline badly and this truck has close to 230,000 miles on it. After putting the new injection systems in, I did not receive any more mis-fires on an... Trouble codes: P0300 (p0303-), P0303 (p0150-), P0150.
1996 Oldsmobile Achieva SL 2.4L thermostat VIN: 1G3NL52T6T
Thank You so very much all who responded to this fix I located a kink in the heater H-pipe someone else had previously removed the heater core and bypassed the hose causing the kink starting the root of the problem I replaced the hose and routed it directly to...
2002 Pontiac Aztek 3.4L temp VIN: 3G7DAO3E32
iATN rocks! This car is fixed, and down the road with new head gaskets. Gerry and Jonatan both even nailed it exactly on which cyl. it was! #1 cyl. gasket was sucked in. It was also cracked to the outside, but I didn't see a leak. This one had no warping, or c...
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