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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for January 21, 2005
International Automotive Technicians' Network (iATN) - Members Only
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Open Help Requests for GM
Help Request Answers
1987 Buick Regal Limited 3.8L reverse VIN: 1G4GM11A2H
Hey, I need some old school tranny guys help. I have this 1987 Buick LeSabre that had no reverse. I dis-assembled the trans and found that the low and reverse clutches were wiped out, so I overhauled the trans. Now it has reverse when it is cold, but once the ...
1997 Cadillac Seville SLS 4.6L dash lights VIN: 1G6KS52YXV
Dash lamps do not come on when any full spectrum lighting is available. Inside the bay the lights work correctly, under a cover the lights work correctly. By putting black tape over the photocell the lights worked correctly. We replaced photocell but it did no...
1999 Cadillac Seville STS 4.6L abs & traction control VIN: 1G6KY5499X
After completing a brake job on this vehicle the amber ABS and TRACTION lights came on along with: SERVICE STEERING SYSTEM and SERVICE STABILIZER SYSTEM in the message center. The only other thing disconnected beside the pad sensors were the rear speed sensors...
1988 Chevrolet Celebrity 2.5L Poor Fuel Economy, MIL Lamp on VIN: 1G1AW51R2J
the vehicle is burn very rich in fuel, its getting hard to start since the light has come on. in 4 days he is going through a tank a gas which it is looking like 10 to 15 miles a gallon. the customer travels about 25 miles round trip. opun trying the read the ... Trouble codes: 12 (i can only get this if i use a jumper wire)
1994 Chevrolet S10 4.3L Stall VIN: 1GCCS14W5R
This truck came on the hook after a battery install started the truck. After the truck warms up it cut off by losing fuel pressure. Checks the fuel pump relay at the RH side of engine compartment, it appears ok I have switch with other relays but no improvemen...
1995 Chevrolet Lumina 3.1L Lifters VIN: 2G1WL52M95
We just did intake manifold gaskets. Had it done in one day, but the problem we have is that there is no oil pressure getting to the rockers. We have it at the lifters and the oil pressure is 40-45 at idle and 30 cranking engine. Took valve covers off and foun...
1996 Chevrolet Monte Carlo LS 3.1L Poor Idle Quality, MIL Lamp on VIN: 2G1WW12M9T
When I got this vehicle I was told that it failed the emmision test and that the mil was on. Scanned for codes, none found. While observing scanner data I noticed that the idle did not want drop below 1300rpm and if you tried to control the IAC the rpm would o... Trouble codes: P0171 (bank 1 lean)
1997 Chevrolet K1500 Cheyenne 5.7L MIL Lamp on VIN: 2GCEK19R7V
this vehicle was in our shop 1yr ago and replace engine with jasper reman came back few weeks later and found bad #7 and #8 injectors - replaced injectors - came back 1 month later and found #5 injector weak - had miss fires and those cylinders - truck came ba... Trouble codes: P0300
1998 Chevrolet Express 2500 5.7L axle VIN: 1GBFG15R4W
We traded one problem for another. Axle was replaced with a Jasper reconditioned unit to solve a previous noise problem. The vehicle has returned with a bad vibration at 70+ mph. He had the tires rotated and balanced by another shop first with no change. We ha...
2002 Chevrolet Suburban 1500 LS 5.3L abs VIN: 2GNEC16T62
customer complains when braking just before it comes to complete stop at slow speed at 2 to 3 miles in hour the brake pedal pulsate, I drove the truck on a dry road & i noticed that The ABS is activated when you come to stop, just wright before it comes to com...
1988 GMC C1500 Sierra SLE 5.0L Poor Idle Quality, Hesitation, Stall VIN: 2GTDC14H1J
1992 GMC FORWARD 2.4L warning light display VIN: J8DC4B1K1P
This GMC branded Isuzu cab forward truck with the 4 cyl t/diesel has the right side green warning light come on after startup.. The display looks like a butterfly in a throttle bore with air current above butterfly.. I need to know what this light means.. I ha...
2002 GMC Sierra 2500 HD SL 6.6L fuel gauge and water tempeture gauge VIN: 1GTHK23112
Driving down the road with this truck it will all of sudden start flashing a low fuel message, (and the gauge will drop right back to empty), the water temp. gauge will drop back to zero,it will tell me my battery is dead, it will also flash the security messa...
1991 Pontiac Sunbird LE 3.1L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Cuts out, Stall VIN: 1G2JB11T8M
this car seems to have rough idle once it goes into closed loop. intergrator drops to 85 and block learn stays at 100. with the probe HC reads great at 2000 RPM and CO is great .2 but when relasing the throttle the HC & CO goes up and down. So bad sometimes 8-... Trouble codes: 45 (rich condition)
1997 Pontiac Grand Am SE 2.4L MIL Lamp on VIN: 1G2NE52T2V
Customer originally brought car to AutoZone and had it "diagnosed" for free. They told them they needed an EGR Valve. Customer called me to ask about installing a valve for them. I suggested that they have us perform a computer engine analysis to confirm AutoZ... Trouble codes: P1404 (egr pintle position)
1997 Pontiac Trans Sport 3.4L piston VIN: 1GMDU03EXX
This vehicle came in with a tapping noise at all rpm ranges. Started suddenly, noise was coming from #6 cyl. Replaced lifters just as a precaution. R & R 246 Head and found top of piston chipped and spark plug electrode looked like you had been welding with it...
2001 Pontiac Grand Prix GT 3.8L right front wheel bearing VIN: 1G2WP52KX1
Simply the right front bearing continues to go bad and then it eventually causes the abs light to come on for the right front speed sensor.I have replaced three bearings ,2 aftermarket ,one dealer,then the dealer put one in also. The customer came in for unrel...
2000 Saturn LS1 2.2L engine VIN: 1G8JU52F2Y
Hi all, This saturn has what sounds like an upper end noise. About three months back it was making the same noise. When we took the accessory belt off the noise quit. The drive belt tensioner was slightny noisy and seemed to take very little effort to deflect...

Fixes & Summaries for GM
Fix/Summary Answers
2004 Cadillac CTS 3.6L tire wear VIN: 1G6DM57754
replaced tires with hankook tires rides alot better and a price of $65.00 compared to goodyears at $125.00
1990 Chevrolet Corvette 5.7L Excessive Emissions, MIL Lamp on VIN: 1G1YY338XL
The reason why the EGR valve did not receive enough exhaust back pressure was due to 2 missing front catalytic converters which was suppose to be mounted at the 'Y' pipe in front of the main converter. By installing the 2 front catalytic converters, I was able... Trouble codes: 32 (EGR system).
1997 Chevrolet Express 2500 5.0L Excessive Emissions, Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GCFG25M5T
Thanks to everyone who replied,the regulator was leaking causing the low pressure,but worst of all was the corroded computer(injector pulse to #3 intermittently stay open)thanks to tim in NS for pointing that one out,GM should have made that drip rail longer.r... Trouble codes: P0134, P0135, P0300.
1999 Chevrolet Blazer 4.3L No Start VIN: 1GNCT18W9X
Well Thanks to all who responed to this post.Seems there is a difference in option,but I guess that's why IATN is so great.Anyway we took most everybodies advice either before or after postings.We checked the wires to the CPS and checked the air gap seemed to ...
2000 Chevrolet Venture Warner Bros. 3.4L Cuts out, ACTS LIKE ON REV LIM VIN: 1GNDX13E6Y
Thanks to all those who responded. After checking and rechecking, I decided to remove the intake plenum and take a look at the wiring underneath. During removal, I went to remove the coil pack assembly and thought I may of stumbled onto the problem. Two out of... Trouble codes: 1811 (Max. adapt and long shift).
2000 Chevrolet Impala 3.8L MIL Lamp on, cant fill fuel tank VIN: 2G1WH58Y92
Im pretty sure this vehicle is fixed. I have not heard otherwise from the customer. I removed the tank and did not see anything wrong. I had my assistant replace the canister and reinstall teh tank and fill it up. He came back and said it would not take fuel a... Trouble codes: P0440.
2000 Chevrolet Blazer LS 4.3L Bellhousing Bolt VIN: 1GNDT13W0Y
I went with the majority & raised the body. Thanks to too many to mention! I tip my hat to you GM techs, if I had to work on S10's everyday, I'd quit. I've been turning wrench's for 28 years & I can't see how GM can get by with such peverse engineering. Thanks...
2000 GMC Sierra 1500 SL 4.3L No Start VIN: 1GTEC14W2Y
The GMC is fixed and gone down the road. Yes, the newer style fuel regulator gives problems much like the earlier ones. We replaced the fuel regulator and left the spider assembly uninstalled with the fuel lines hooked up and powered up the fuel pump -- no mor...
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