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Prev Professional Automotive Repair Technical Discussions for December 21, 2004
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Open Help Requests for GM
Help Request Answers
1990 Buick Park Avenue 3.8L No Start, Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire VIN: 1G4CW54Z7L
Hello and Happy Holidays guys! This is a Christmas present for myself, to get this car fixed. Customer contacted me about vehicle and complained that they had it at several shops for poor driveability, stalls after short distance of driving when coming to a... Trouble codes: 22 (Unknown - Possible TPS volts too high), 42 (Unknown- Possible Mass airflow circuit)
1991 Buick Regal Custom 3.1L coolant level VIN: 2G4WB54T3M
Vehicle uses 1/2 gallon of coolant each day,30 miles driven. I have pressure tested radiator found no external leaks. Combustion leak test shows no combustion in radiator. Radiator pressure normal.Vehicle did over heat once. Smoke,steam, with antifreeze smell ...
1997 Cadillac Seville SLS 4.6L Cooling sys. VIN: 1G6KS52Y9V
This Cadillac wants to overheat after going up a small mountain. The owner states that as he crests the top the car will overheat a coolant will come out the overflow. He says he waits till it cools, tops off the cooling system & it's fine the rest of the trip...
1993 Chevrolet K3500 Cheyenne 5.7L Hesitation VIN: 1GCHK34K5P
1st start of the day, truck starts and idles fine. When you give a little throttle to back out of the drive, it will hesitate/lay down. If you goose it or let up on the throttle and let it idle it is fine. Problem goes away after vehicle has run for a few minu...
1993 Chevrolet Cavalier RS 2.2L Master Cylinder VIN: 3G1JC1144P
Hi Group: Need to pick a few brains. Customer complains brake pedal hits rhe floor. This has happened a few times in the last few days. I'll start from the begining. Car came for noisy brakes. Replaced rotors, pads, drums , shoes and both e brake cables. No pr...
1995 Chevrolet K1500 5.7L Poor Idle Quality, Surge, MIL Lamp on VIN: 2GCEK19KXS
Dear group, I am trying to repair this driveability problem with this truck.The vehicle came in with a minor problem of not accelerating all of the time after reaching traffic speed.If you go ahead and put the throttle down 1/2 pedal or more it will go on an ... Trouble codes: 32 (egr), 33 (map sensor low), 45 (rich ex)
1996 Chevrolet Lumina 3.1L No Start VIN: 2G1MN52MOT
no codes, cranks strong, if you pull ignition wire off to check for spark engine starts up and will run fine once removed wire is re installed. Could this be from lean condition on start up ?
1996 Chevrolet Blazer 4.3L No Reverse VIN: 1GNDT13W7T
Customer states no warning to this problem, Went to back out of garage and no reverse, just a wining noise not loud. Trans fluid is a little burned but not to bad, and level is full. Is very harsh when put into drive and a harsh up shift 1-2,2-3 and check eng...
1996 Chevrolet Cavalier 2.2L Hesitation, Poor Fuel Economy VIN: 3G1JC1243T
I have a fuel problem with a 2.2l. On the scan tool the engine load at idle is 39% which I know it is way off. Checked for intake and exhaust blockage found non. Engine bogges and will not open up. Don compression test found all cly. ok. Customer said it happe... Trouble codes: 172 (rich condition)
1996 Chevrolet S10 LS 4.3L 4wd VIN: 1GCDT14X0T
The 4wd engagement is the problem with this vehicle. The cable moves the pin but there is a problem with the engagement. At any speed the gears at the front diff grind when attempting to go into 4wd. You have to be in park or neutral to engage the front differ...
1997 Chevrolet Astro 4.3L Surge, Misfire VIN: 1GNEL19W6V
I'm missing something obvious here, please tell me what it is; Here's the condensed story... vehicle came to us with coolant in the #5 cylinder, pulled the head and found a large crack in the cylinder wall. Now has a NEW 4.3 GM engine and has an irritating sur...
1999 Chevrolet Tahoe 5.7L Misfire, MIL Lamp on VIN: 3GNEK18RXX
iatn menbers i have a 99 chevy tahoe with missfire on #3&4 clys #4 cly having the most missfire.only occures under heavy throttle.rpm@3200 speed above 70 mph will missfire all the time wile throting.this is what i have done to the tahoe i have done conplete tu... Trouble codes: 303, 304 (missfire)
2001 Chevrolet Blazer LS 4.3L Accessories VIN: 1GNDT13W61
2001 blazer that intermittent will not start. cranks fine. we found that the scanner will not communication with vehicle when this happens,no shift indicator. headlite will come on by them self intermittently. if you disconnect battery, reconnect in a few hour...
2002 Chevrolet Cavalier 2.2L headlights VIN: 1G1JC52472
This problem is intermittent, left side headlamp will be dim and right side normal. Daytime running lights inop when problem is there. Customer says he hits dash and lights come back on? (intermittently). When I pulled the daytime running light relay out and r...
2002 GMC Envoy SLE 4.2L Windows, Door Lock VIN: 1GKDT13S12
Nothing in the passenger door works! Power window, Door locks, power mirror. Checked for BCM codes with Tech 2, scanner says " no communication" for Passenger door module! Driver's door module does communicate! No codes for that module. Everythings works ok fo...
1991 Oldsmobile Delta 88 Royale Brougham 3.8L Transmission VIN: 1G3HY54C3M
The owner of this vehicle has been complaining of this problem for a year now. It's same old thing of it never acts up when we have it. I was wondering if someone out there could help us with this one. He tells us that as he is driving it acts as if the key is...
1997 Pontiac Firebird Formula 5.7L MIL Lamp on VIN: 2G2FV32P2V
worked on evap a few day's ago, po441. just got back from vacation ,this trans am had charcoal inside the evap sol and vac sw was missing (salvage title ).so i replaced the canister and vac sw and evap sol blew lines out with shop air .checked voltage at vac s... Trouble codes: P0441

Fixes & Summaries for GM
Fix/Summary Answers
1990 Chevrolet K2500 Cheyenne 5.7L Electronic VIN: 2GCFK29K2L
First of all, thanks to John, Dave, and Clyde for the help on this one. The problem with this vehicle, however, was incorrect control head had been installed. The owner of this vehicle has only had it 6 months and did not know the history of vehicle, but appar...
1996 Chevrolet Corvette 5.7L air bag VIN: 1G1YY22P5T
sorry for the late closing,had to order module.after replacement began getting intermitten code 24.sent to dealer due to no load simulator to contue on.
2000 Chevrolet Astro 4.3L Fuel guage, Temp. Guage cluster lights VIN: 1GCDM19W9Y
Thanks everyone who replied. We tested the ingnition switch, checked all grounds, checked wires at the bulkhead with no success. We ended up sending it to the dealer who then in turn called us back saying they couldn't figure it out and if the could have more ...
2000 Chevrolet Astro 4.3L Gas Gauge VIN: 1GNEL19WXY
Thanks for the replies. It indeed turned out to be the fuel level sensor which is todays name for a fuel sending unit. It is in the gas tank attached to the fuel pump assembly. Relativly easy repair.
2000 GMC Yukon Denali 5.7L brake pedal VIN: 1GKEK13R8Y
to everyone that responded,'thanks'.unfortunetly i do not have a positive close here.all suggestions were considered despite how simple they may have been.we did check adjusters and the abs pins. as we do not have a tech2 yet,we decided to send this one to the...
2002 Saturn Vue 3.0L MIL Lamp on, lean code VIN: 5GZCZ63B12
followed Bulletin No.: 02-06-01-016A. all is well. have access to gm bulletins but could not find it. thanks to all who responded and for reminding me that all-data also has a bulletin search platform. Trouble codes: P0171, P0174.
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