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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for September 27, 2004
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Open Help Requests for GM
Help Request Answers
2000 Cadillac Seville SLS 4.6L power steering VIN: 97YU189454
the power steering effort is hard @idle , once rpms are increased as little of off idle stering funtions normal
1985 Chevrolet Corvette 5.7L clutch VIN: 1G1YY0782F
Hi guys, Help! We replaced the clutch for this problem. Original complaint was had to pump to get a pedal. If you ride the pedal, it will shift fine. As soon as you let off all the way, you have to triple clutch it to get it in gear. Original was blue and to...
1995 Chevrolet Lumina 3.1L Poor Idle Quality VIN: 2GLWN52M4S
this lumina has a erratic idle at times and customer had changed iac before having our shop check it out. at times engine will run 1400 rpm's and up to 2000 rpm's when started.no codes in ecm,checked for vacuum leaks,removed iac checked and cleaned passages r...
1996 Chevrolet Cavalier LS 2.4L Balancer shaft timing VIN: 1G1JF52T2T
Hello everyone and thanks for the assistance on this one. I had this 2.4 come in overheated bad with scored pistons. We disassembled the engine and repaired head and installed new pistons, but when we disassembled, we did not mark the timing of the balancer sh...
1997 Chevrolet K1500 Suburban LS 5.7L steering VIN: 1GNFK16R6V
this pull is a little more than a drift -- no loose parts it might be my imagination but it seems like it turns a little harder to the left than it does to the right -- no binding brakes both turn free -- no sticking ball joints or tie rods all move free -- ha...
1999 Chevrolet Astro 4.3L Hesitation, Misfire VIN: 1GNEL19W6X
Hey guy's tech lost needs help. Working on a 1999 chevy astro van. One of are first vans from a particuler fleet account.Came in for hessitation on acclaration and AWD light on also anti-loc light on.Checked for codes and found c0226,c0222,p0101,p0463,u1041,u1... Trouble codes: P0101, P0463, U1041, U1192, C0226, C0222
1999 Chevrolet K2500 Suburban 7.4L Poor Idle Quality, Hesitation, Misfire VIN: 1GNGK26J5X
great customer,came in and said he changed his own spark plugs because he had a miss at idle. He asked me to look at it and see what I could make of it. Sounds too simple ? right ? Well #1 cylinder will not fire normal at idle !!, under load or not . I have do...
2002 Chevrolet Silverado 2500 HD 6.6L No Start VIN: 1GTHC23132
Hi ladies and gentlemen.this is the first duramax that we try to work on,towed in not running,hook up to Snapon scanner ,there is no code,frp is 1 mpa when engine not turning ,2 mpa during cran'king,hook up vacc gauge to fuel port,prime fuel system to 10 psi,i...
1999 GMC K3500 Sierra SLT 7.4L Excessive Emissions, No Start, Poor Idle Quality, MIL Lamp on VIN: 1GTHK34J7X
Replaced coolant temp sensor and thermastat- tested all O2 sensors - replaced bank 2 sensor 2- run injector flow test with tech 2 - found no. 6 bad- cleaned than replaced all injectors and had fuel rail cleaned by Linder- checked removed tank cleaned- replace ... Trouble codes: P0125, P0141, P0161
2000 GMC Savana 3500 5.7L dist gear VIN: 1GDHG31R4Y
van came back with notiable drivabilty problem on decel coast and just when you started to get back into thottle off coast it back fired, run rough and shows multible missfire and lean condition, replaced egr valve, had van calibration updated, none of the abo...
1995 Oldsmobile Cutlass Supreme 3.1L MIL Lamp on VIN: 1G3WH52M35
Older driver, no hot rod. Under normal driving the check engine light will come on with code 77. The next time you drive, it will not come on. It comes on about every fourth drive. They use regular marathon gas. Never B.P. This is the exspensive EGR valve with... Trouble codes: 77 (EGR solenoid problem 3)
1999 Pontiac Bonneville SSE 3.8L security system VIN: 1G2HZ5213X
hi group while driving security light will come on in dash, and if you arm the system approx 5 minutes later alarm will go off, scanned body computer no codes the only 2 things i see that i dont like is the key in ignition pid does not show that the key is in ...
2000 Pontiac Grand Prix GTP 3.8L No Start, Stall, starts/shuts off VIN: 1G2WR5217Y
Hi All This started with an evap vent code...ran great...started testing vent sol lr fenderwell 15.5 ohms not sticking (used snapy to turn on the sol ..moved up to purge sol by alt... then veh hasn't started and ran longer then 10 secs since... master tech cam... Trouble codes: P0446 (evap vent sol control starts and runs here), P1629, U1255 (no communication 24 cycles ago found this later)
1995 Saturn SL2 1.9L filter VIN: 1G8ZH1278S
since filter replacement it has come loos 3x

Fixes & Summaries for GM
Fix/Summary Answers
2000 Buick LeSabre Custom 3.8L tcc apply VIN: 1G4HP54K1Y
well the fix for this buick was two fold. i ended up replacing the valve body and the torque converter.now the end of the apply is perfect.thanks to all that replied!
1989 Chevrolet G20 Beauville 5.7L brakes VIN: 2GCEG25H1K
the proportion valve was not doing its job. installed new one again and fixed problem
1996 Chevrolet C2500 Cheyenne 5.7L Excessive Emissions, Poor Idle Quality, Misfire VIN: 2GCFC29R7T
thanks to all the guys that replied to this request. we just did'nt go far enough in testing. we induced propane into the crankcase with the pcv and vent blocked, and the misfire counts dropped. the lower intake gasket was indeed sucked in between 5 and 7. rep... Trouble codes: P0300.
1997 Chevrolet Cavalier 2.4L suspension
I appreciate everyone's help on this. However, the customer has not returned the vehicle to me as of yet. Most of the replies leaned toward the lower control arm bushings. That's where I'm going to start. Thanks again to everyone who helped.
1998 Chevrolet K2500 Cheyenne 7.4L Hesitation VIN: 1GTGK24JXW
The problem was the knock sensor module something must have happened to it when i put in in the PCM. Thanks for all the replies.
1999 Chevrolet Lumina 3.1L engine VIN: 2G1WL52M4X
Well first of all thanks to everyone who replied. I got thenoise down to a wrist pin and the customer opted not torepair at this time. This car also had Death Cool, excuseme Dex Cool, seeping out of the intakes and water pump,unforunatly no suprises there. Aga...
1999 Chevrolet Tahoe LS 6.5L a/c compressor VIN: 1GNEK13R7X
Thanks to all the helpful replies. I am in western Pa. witch has just had some major flooding and my customers vehicle was flooded so it may not be coming back for us to use any of the help for info. I'm sorry about the capital letters I was unaware that it wa...
1988 Oldsmobile Cutlass Ciera Brougham 2.5L Hesitation VIN: 2G3AM51R2J
Thanks for all the help(10 good suggestions). Stephen from Pensylvania and John from New Jersey both nailed the problem. Many others suggested taking a look at the injector wave pattern and I was suspicious of the injector, but not quite sure how I could monit... Trouble codes: 45 (lean o2).
1997 Pontiac Sunfire SE 2.2L Hesitation, Surge, Misfire VIN: 1G2JB1241V
my apologies on this post as i thought i closed this some time ago. i replaced the #3 and 4 injector. problem solved. once again sorry for any inconvenience. Trouble codes: 300 (random cylinder misfire).
2000 Pontiac Bonneville SE 3.8L column VIN: 1G2HX52K2Y
Thanks, again... I went into this from the wrong end. Lower intermediate shaft was out and lubed in about 1/2 hour. We got lucky on this one as the lube kit did cure the complaint. Now about that swaying fuel gauge... THANK YOU.
1992 Saturn SL1 1.9L MIL Lamp on VIN: 1G8ZH5492N
Hi everyone, Many thanks to all for their replies. The question that was worrying me was the fact that the EGR solenoid was been switched 'on' by the ECM at all times. Thanks to James [...] who put me straight on this, the soenoid does not allow EGR gasses to pa... Trouble codes: 26 (quad driver fault).
1997 Saturn SC2 1.9L blower moror VIN: 1G8ZH1275V
Thanks to all who responded. This vehicle was in fact modified with a module to run the blower to dry out the evaporator to prevent the musty smell, per a tsb from saturn. The module was located under dash in frt of the center consol. Their also was a relay lo...
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