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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for April 12, 2010
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Open Help Requests for GM
Help Request Answers
1994 Buick LeSabre Custom 3.8L No Start VIN: 1G4HP52L0R
this car has been in and other techs have been in it for intermidate no start stalling couple pcm and module replaced when i got to it no scanner comm and cooling fans running checked all powers and gounds fans will sometime just click relay and car will start...
1986 Chevrolet C20 Silverado 7.4L valve lifter
One of my students is overhauling an 1986 454 chevy engine and he did not catch it until assembly, but it has 8 lifter bore bored .010 oversize. Does anybody know where we can buy them? I called Jasper and they admit that they do it, but they buy them in bulk ...
1997 Chevrolet C1500 Silverado 5.7L Cuts out VIN: 2GTEK19R2V
I could use some help on an intermitant falt. the injectors on this truck seem to stop fireing for only one revilution of the engine intermitantly.
1998 Chevrolet S10 ZR2 4.3L brake line VIN: 1GCCT14W8W
Hi guys, I replaced the brake line to the rear of the vehicle and tried bleeding the brakes numerous times but I can not get any pressure to the rear brakes. Master cyl was empty when the customer dropped the vehicle off so I bled the master cyl as well. Stil...
1999 Chevrolet C3500 6.5L Excessive Emissions, Stall VIN: 1GDKC34F6X
The owner says that the truck has always smoked since they have owned it. (about 80k miles). The drive says that it randomly dies and sputters. I have only had it die on me one time. The only thing I can think of is either the fuel cutoff solenoid or the pump ...
2002 Chevrolet Suburban 1500 LT 5.3L Misfire VIN: 3GNFK16TX2
Ok im at the point of going nutz on the engine. came in dead miss at idle #5 / #4 (only set mil p0305 / p0300). raise rpm up and miss goes away and some engine noise appears(from where i dont know yet, kinda have a metronome beat at idle too) Customer replaced... Trouble codes: P0300, P0305
1993 Geo Prizm 1.6L Master/Booster VIN: 1Y1SK5367P
Happy monday everyone.. This one has us all stumped. This car came in for a no brake peddel we replace the rear brakes and springs as costomer request and relpace the master for the no pedle consern. Car left next day costomer came back with the brakes locked ...
2000 GMC Jimmy SLT 4.3L MIL Lamp on VIN: 1GKDT13W9Y
continue to have a code P0446 (EVAP Vent System Performance) I have 2.7 volts at the tank pressure sensor KOEO that = 0.18 InH2o. KOER = -7.25 InH2o. With sensor unplugged KOEO scan tool reads + 7.50 InH2o. I have changed the sensor as per Identifix direct h...
2004 GMC Envoy XUV SLT 4.2L guages,i/plights VIN: 1GKET12S74
everything on instrument panel will quit working but the speedometer and tach.the guages drop out and all instrument lights in dash will come on.this happens every now and then.when this happens it lasts only a few seconds and everything goes back to working.c...
2006 GMC Sierra 2500 HD WT 6.6L None
Hey IATN guys. Thankfully I don't think I have a problem. I have a question for the Duramax guys. I personally own an'06 truck with an LBZ engine which I got new. I know there were some problems with the LLY glow plugs breaking in the heads. The LBZ has glowpl...
1994 Oldsmobile 88 Royale 3.8L abs lamp, cruise control VIN: 1G3HN52L9R
This one is kicking my butt, and i need some help. This thing came in with the complaint of no cruise control. I found the code of P1562- cruise vaccume solinoid, Also the cruise control would not work. So I followed the flow charts provided from Mitchell and ...
1996 Oldsmobile 88 Royale LS 3.8L start/dies VIN: 1G3HY52135
Hey guys, Have a problem child here with a long history of security issue.[start/dies. come back later and starts according to customer]. security module and pcm have been replaced at some point , pellet in key has been bypassed at the security module with the...
2001 Pontiac Grand Am SE 3.4L engine noise/dies out VIN: 1G2NF1ZE21
This vehicle runs fine but after it gets warm it starts to sound like a deisel and knocks as well as lifters clattering inside. The engine surges and the noise comes and goes as the RPM drop and rise. The oil pressure was reading about 25psi to 30psi at idle w...
2003 Saturn Vue 2.2L no gears VIN: 5GZCZ43D03
scaned code p1758, car was towed in with no forward or reverse gears. we have not worked on one of these but suspect a damage belt internally. most things state to replace case cover assembly??? why is this. and can this job be performed in the car or must the...
2003 Saturn L300 3.0L door lock VIN: 1G8JW54R33
Customer had car towed in for a dead battery. customer stated that if he uses his keyless remote to lock doors, Battery will be dead in morning. If he uses the key to lock the doors the battery will be fine. Im going to lean toward a BCM problem but would like...
2005 Saturn Relay-3 3.5L power sliding door VIN: 1GZDV23175
This thing came in with both left/right sliding doors inop. Also the driver's power seat was inop. There was a clicking noise coming from both sides in the rear, sounded like a relay. I pulled codes using a Tech2, got B1292, power sliding door motor control ...

Fixes & Summaries for GM
Fix/Summary Answers
1991 Buick Park Avenue 3.8L heighth control poping noise VIN: 1G4EW53L6M
well it required replacing the upper strut bushings and using low grade lock tite and making sure they where good and tight to fix the clunck noise. as for the sudden drop in the suspension after the key is turned off it is very intermittent and I cannot find ...
1995 Buick Riviera 3.8L No Start VIN: 1GAGD2219S
Thanks to all for the help with this one! I installed a second pcm same deal- no communication with pcm and no injector pulse. I then found a known good pcm and car started. so I installed the prom into new pcm and now have communication and injector pulse. Th...
1997 Buick LeSabre Limited 3.8L Cuts out, Stall VIN: 1G4HP52K9V
Hey guys, Thanks for all of your time, what we found was the fuel press regulator was leaking...after the third time looking and hoping to see fuel bamm there it was dripping out. Strange how it does not leak thru sometimes??? I figure if diphram damaged it le...
2004 Cadillac CTS 3.6L No Start VIN: 1G6DM57754
I should have done more preliminary tests rather than follow my gut instinct on this one. It was shutting down fuel after about 2 seconds of run time which felt like an antitheft stall,the tech2 showed no antitheft problems and fuel was enabled. I did manage ...
1994 Chevrolet C1500 4.3L engine tempature VIN: 2GCEC19Z2R
2001 Chevrolet Silverado 3500 6.6L No Start VIN: 1GBJC34X1X
thanks to all who replied.replaced all eight injectors. i beleive that number 8 was the culprit although it looked fine,when it did run and i killed #8 with my scan tool i got no change in the way it ran. the injectors are warranted for 7 years or 200,000 mile...
2004 Chevrolet Corvette 5.7L Heads up display and driver info center VIN: 1G1YY22G24
Hello, I would like to say thank you to Dustin [...], who hit the nail right on the head with this one!! While the car started fine, and the customer didn't complain of a no start, slow start situation, we load tested the battery and sure enough it failed! ...
2005 Chevrolet Express 2500 4.8L Engine VIN: 1GCGG25V35
Thanks Everyone who tried to help. I had warmed up the engine and imediately attached pressure tester and i got 8 psi drop in just 2 mere hours !! I , then removed spark plugs and cranked engine over . There was no coolant visible . I offered customer to rem...
2005 GMC Envoy XL SLE 4.2L engine VIN: 1GKET16S15
thanks guys, put in used motor. Found oil rings seized in old motor. Thanks AL
2008 GMC Sierra 1500 SLE 5.3L noise VIN: 3GTEK13368
i removed the intake and the lifter manifold found the rear lifter scoring up the cam lobe cust. took it to the dealer for powertrain warrnty.
2004 Pontiac Grand Prix GT1 3.8L evap & cat VIN: 2G2WP52244
Thanks to all. I finally had to put this puppy on a dyno in order to run absolutley perfect to the letter drive cycles. Evap set after the 3rd attempt and the Cat set after 4 attempts. So long Pontiac GP!
2004 Saturn Vue 2.2L cluster VIN: 5GZCZ23D74
Limited time to diagnose and fix this while visiting friend. I suspect a bad cluster, wiring,bcm, bulbs or rheostat in the dash. without a wiring diagram and a scanner, I was reluctant to waste my time in town dissassembling this dash. Many thanks to the 6 te...
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