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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for August 29, 2006
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Open Help Requests for GM
Help Request Answers
1991 Cadillac DeVille 4.9L Cooling Systems VIN: 1G6CD53B8M
Hello to all. I am stuck with what to do with this cadillac 4.9l. I have a obvious oil in cooling system. We thaught ok cooler leaking ( has oil cooler and trans cooler) but radiator shop says no leak.I have checked with alldata for oil flow through engine and...
1999 Cadillac Seville SLS 4.6L starter VIN: 1G6KS54YXX
I have a problem in that I am a chrysler tech working at a chrysler shop. I have a lack of information and to make it worse I can't get this thing to act up. The sevice writer told me the vehicles starter would just click and after several trys sterted. no jum...
1990 Chevrolet K2500 Cheyenne 5.7L Poor Idle Quality VIN: 1GCFK24K4L
truck idling rich.blocklearn and intergrater is running at minium 108.truck idles high every now and then.truck runs good at crusing speed.i have checked the basics and then some.thanks in advanced for any help.
1990 Chevrolet Lumina Euro 3.1L Cuts out, Stall VIN: 2G1WN14T7L
Hello all, This car will just up and quit (Like the key was turned off) most of the time when it is accelerated hard. Hard meaning all the way to the floor. Very seldom will it quit when just normally accelerated. Sometimes if you let off the accelerator it w...
1995 Chevrolet K3500 6.5L timing VIN: 1GBHK33F7S
I replaced the injector pump on this truck, first one I have done on a 6.5 chevy. It starts & runs, but I need to set the injection timing, and my snapon scanner says it has to be done at the dealer. Is there anything I can do, or do I have to hand it over to ...
1996 Chevrolet Lumina 3.1L Poor Idle Quality, MIL Lamp on VIN: 2G1WL52M4T
Hi everyone thanks for your help, this car has a po300 random misfire code but isn't missing runs really rough until you unplug the maf then it smooths out with maf hooked up map voltage is 2.5-volts when un hooked it's 1.44 volts and up vacume too map is 19 i... Trouble codes: P0300
1997 Chevrolet S10 4.3L Hesitation, Surge VIN: 1GCDT14X7V
This little S10 doesn't get a lot of miles but it is used about every day. Friday I recived a report it was surging pretty bad, I also found the exhaust smelled pretty bad as if the converter was plugged but that's not the case. From 0-30 mph at part throttle ...
1999 Chevrolet Express 2500 5.0L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1GCFG25M3X
This van has a very cool problem. On hard accel, it will accelerate to almost the 2-3 shift point, and then just surge while slowly losing speed. Feels just like a lack of fuel, but pressure holds steady at 61 psi throughout the condition. It also begins to sp... Trouble codes: P0108 (MAP Hi), P0300 (Random misfire), P1106 (MAP Hi Intermittent)
1999 Chevrolet C1500 Suburban 5.7L MIL Lamp on VIN: 3GNEC16R7X
Thank god this is a friend's vehicle. Yes, the Suburban is in for it's SAME 5th O2 problem in 1 year! My tech is pretty sharp, but his and the shop's credibilty are in jeopardy. The same tests are run, and the same O2 is found bad each time. We suspect some ki... Trouble codes: P0137 (bank 1 sensor 2 low signal)
2000 Chevrolet Malibu 3.1L MIL Lamp on VIN: 1G1ND52J4Y
Testing the 24x sensor showed no output. Replaced with Borg Warner. Tach now works, but at idle, it jumps up about 200 rpms every couple of seconds, won't read above approx 2500 at any time and code 336 resets. Reading 24X on a brick, it seems fine, agrees wit... Trouble codes: 336 (crankshaft 24x signal)
2000 Chevrolet Cavalier 2.2L Air Bag Clock Spring VIN: 3G1JG5247Y
Hi , this one of about 10 late model GM vechicles I have run into with noise in the steering wheel coming from the air bag clockspring . A tech at a GM dealer told me somtimes they change them but the new ones are as noisey someone else said there was a way to...
2001 Chevrolet Tracker LT 2.5L side markers VIN: 2CNBJ73462
hay guys have this tracker here side markers are on lic plate light on corner lights on all the time key out key in the only way they go out is unplug the headlite relay lights go out!replaced with a good one lights still on i think daytime light has something...
2001 Chevrolet Suburban 2500 8.1L Starting VIN: 3GNGK26G21
Hello all. This 01 Suburban intermittantly will not crank. No lights interior or exterior at this time. The owner tried to jump start it. Did not start either. He did not recheck the lights at that time either. I have yet to duplicate the issue. Found a tsb ab...
2000 GMC C3500 Sierra SL 6.5L Hydroboost/brakes/steering VIN: 1GDKC34F7Y
Vehicle came in with good brake pedal and steering at idle.While driving at normal speed and atempting to brake the pedal will go down as in a bad master cly,or a fluid leak,and no power steering. After pumping the brake they return to working normal, and the ...
2003 GMC Sierra 3500 6.0L MIL Lamp on VIN: 1GDJC39U33
Thanks for reading this post. Been have this problem with this truck for a little over a week. As you can see I tryed just about everything there is. When the truck acts up the computer goes into reduced power mode, which doesn't let the truck accelterate over... Trouble codes: P0120 (p1515-), P1515 (p1516-), P1516 (p2135-), P2135
2004 GMC Sierra 1500 SLE 5.3L radio VIN: 1GTEK19T84
Customer replced radio with used and got message of LOCKED. The original radio would not eject cd so they replaced with used. That is when it arrived for reprogramming. We reprogrammed and the radio was no longer locked. But after reprogramming have no sound, ...
1999 Pontiac Grand Prix GT 3.8L No Start VIN: 1G2WP12KXX
Hello all, I have a bizarre one. This grand prix died while driving, apparant loss of electrical power per customer. Customer states that it would not crank after loss of power and all lights got dimmer and dimmer until car died. Customer installed their o...

Fixes & Summaries for GM
Fix/Summary Answers
2000 Buick Century Custom 3.1L starter VIN: 2G4WS52J2Y
Thanks for all the replies. One coulda got me in the right direction if I had shopkey. I have mitchel and alldata, and neither show the complete starting system wiring diagram. Theirs only included the pcm. Turns out the problem was the bcm. Took it to the dea...
1995 Chevrolet Lumina 3.1L Misfire VIN: 2G1WL52M1S
Well I did not get this one fixed customer said he might bring it back sometime. When the injector wires were switched only the cylinder that had the number one connector to it would miss so it can't be vac. leak, commpresion problem. I replaced the injector h...
1997 Chevrolet P30 6.5L Oil Pressure VIN: 1GBKP32Y5V
Thanks to all for information on this problem of low oil pressure. Since the bearings and oil pump had been replaced the replies were split between the cam bearings and a crack in the block at the main webs. The 6.2 was bad about the webs cracking but can also...
2003 GMC Savana 2500 4.8L No Start VIN: 1GDGG31V73
Thanks to everyone who helped on this one. Come to find out that the customer who rented this truck put something other than gasoline in the tank. The mixture was not diesel it was something else. Drained the fuel tank and refilled with gas. Veh will start and... Trouble codes: P1626 (theft deterent system activated).
1994 Oldsmobile 88 Royale 3.8L No Start, Cuts out, Stall VIN: 1G3HN52L5R
Well I finally finished this vehicle. After much circuit testing I was determined this vehicle would not beat me and thanks to IATN I won. Turns out the new pcm was defective. The strange thing was that it had the same three codes setting as with the old pcm. ... Trouble codes: P0321, P0341, P0361.
1995 Oldsmobile Aurora 4.0L Cruise Control VIN: 1G3GR62C6S
Hello all, Fix was to replace input shaft speed sensor on the transmission. It turns out I lied when I said no codes were stored, there was a code stored for the input speed sensor no signal. I ignored that code because it has been present for over a year ...
1999 Oldsmobile Cutlass GL 3.1L MIL Lamp on VIN: 1G3NB52JXX
Scoped sensor and it still moved rapidly 200-800 approx. , average cycle 1.6ms. close to spec I believe. Removed sensor and hardly noticeable was a light gray substance that would not rub off. Talked to geezer that installed it and it appears he slathered the ... Trouble codes: P0133 (o2s1b1 slow response).
2003 Other GM Bus 5.9L MIL Lamp on VIN: 4UZAAXBW83
2003 Freightliner is fixed thanks for the replies. The bus had to be taken to dealer, no real way to decipher codes. Code779-255 appeared to be active,fuel pressure sw. was the culprit, seems to be doing fine for now. Thanks again for helpful hints.Also before... Trouble codes: 051 (sid from international scan tool).
1993 Pontiac Bonneville SE 3.8L No Start VIN: 1G2HX52L0R
we cleaned the mounting surface for the ignition module and replaced the module. drove it several time without a problem. seem to have taken car of the problem. thank you to all for the input and the suggestion on the direction to go you were all a big help th... Trouble codes: P0341.
1998 Pontiac Grand Prix SE 3.1L injector pulse VIN: IG2WJ52M5W
this car does not have antitheft on it.now the stupid thing will start and run for a second then shut off. just like a module. i think i will bite the bullit and start throwing parts at it.thanks for all the replys.
2004 Pontiac Grand Prix GT1 3.8L rack an pinion VIN: 2G2WP52204
I pulled the steering shaft apart & greased it. It is nice and quiet now. Customer is extremly happy.
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