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Prev Professional Automotive Repair Technical Discussions for April 18, 2007
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Open Help Requests for GM
Help Request Answers
1974 Chevrolet C20 Pickup 5.7L fuel gauge VIN: CCY244Z137
hello and thanks to all that might help. this truck came to use with various wiring issues and we were able to fix all but the fuel gauge problem. fuel gauge pegs out well above full when ignition is turned on. vehicle has after market tank valve, secondary fu...
1986 Chevrolet P30 7.4L Hesitation, HARD FULL THROTTLE F VIN: 1GBKP37W8H
good ole motor home problem, when full throttle goes flat, like flooding out. Replaced fuel pump, rebuilt carb, secondary fuel tube puled from top, rienstalled no help, slight backing off of throttle cleares out. tried lower gears with no difference, in stall ...
1996 Chevrolet Blazer 4.3L serp. belt VIN: 1GNDT13WXT
Hi everyone, I am posting this for a freind in the shop. We have a serp. belt that has been replaced approx. 3 to 4 times in the last six weeks. It's quiet for the first few days then it begins to squeek. They have tried gates and dayco belts with the same res...
1997 Chevrolet Cavalier 2.2L Misfire, MIL Lamp on VIN: 1G1JC5243V
this is my daughterts car that i put a motor in thanksgiving of 05. has been runnig great until a month ago when it started missing on 2 cyls [comp data said 1&3]does not miss at any set time temp or load . ONE time when it was missing I was able to find that ... Trouble codes: P0300
2000 Chevrolet Blazer LS 4.3L 4wd VIN: 1GNDT13W1Y
Hello, I've got this Blazer that on occasion the "Service 4WD" comes on. I picked it up this morning and the light was on. When I arrived at my shop I went to test the system. Turned the key back on and it started working fine. I Shut it off again and retried ...
2000 Chevrolet Tracker 2.0L head gasket VIN: 2CNBE13C4Y
timing chain crank key worn off & bent 2 valves, removed head, sent to machine shop for reconditioning,installed using oe head gasket, torqued by book from ALLDATA, leaked water in every cy., removed again sent back to machine shop they rechecked said no probl...
2000 Chevrolet Malibu 3.1L Stall, Misfire
all help is good help.good friend of mine brought in his vehicle.has a compliant of engine stall only when a/c on.But mention that is a intermitten problem.No dtc found.However did have history dtc for egr and abs module problems.per scan tool found multiple m...
2000 Chevrolet Blazer LS 4.3L electrical control VIN: 1GNCT18WSY
i do not have access to a wire detail for the 4 wheel drive system. this would help big time if someone can supply it for me. any idea's would be grealy appreciated. when the vehicle was brought in the fuse for the system was blown and blows almost immeadiatly...
2002 Chevrolet Trailblazer LS 4.2L Transfer Case VIN: 1GNDT13SX2
A Dealer brought me this truck. He just had it at a transmission shop & was told there was no problem with tran, that it must be in electronics for transfer case. What is happening is it will drive normally and go through all the functions(4-hi,4-low,2-hi & au...
2003 Chevrolet S10 4.3L dash area VIN: 1GCDT19X83
i have a 03 s10 4wd that has a very slight rattle in upper dash area.sounds like something touching and rattles on very light accel for short time.i can power brake and get noise.i can also set parking brake and put in drive and hear noise but not as loud.nois...
1999 Oldsmobile Aurora 4.0L Misfire VIN: 1G3GR62C3X
This Olds is missfiring under a load, or while accelerating. Scanner shows #1 and #2 both missfiring under power stall condition, or accelerating. I have also checked for vaccum leak have not found one yet. This thing has no codes. If anyone can help please em...
2002 Oldsmobile Intrigue GX 3.5L Hesitation VIN: 1G3WH52H92
has had new air pump installed still have a code Trouble codes: P0410
1994 Pontiac Firebird Formula 5.7L Misfire VIN: 2G2FV22P9R
Hello fellow mechanics once again I need some help with a mind teasing problem. This car has not run for two years. I towed this car to my shop to check why the starter did not operate. After looking at several things the car went up on lift. There we found a ... Trouble codes: 16 (low resolution pulse circut), 18 (injector circut)
1999 Pontiac Bonneville SE 3.8L No Start, MIL Lamp on, lacks power
Vehicle originaly came in with engine locked up would crank... After pulling a few plugs antifreeze poured out of cylinders... Compression test was good on all cylinders. So plenum was remover to check for damage as refered to in applicable TSB. Plenum was fou... Trouble codes: P171
1999 Pontiac Grand Prix SE 3.1L MIL Lamp on VIN: 1G2WJ52M8X
Hello everyone!! I have a problem with a evap system that is throwing a p0446 code (vent blocked). When car first came in we looked it over for pinched lines or hose and the only thing we found was a vent solenoid that was leaking vacuum past it so we replaced... Trouble codes: P0446 (evap vent system blocked)
2003 Pontiac Grand Prix GTP 3.8L brake pedal VIN: 1G2WR521X3
This is and odd one. With the engine off the brake pedal is firm as could be. With the engine running the pedal acts normally and stops the car normally but once the car is stopped the pedal sinks almost to the floor. The car doesnt move or creep but the pedal...

Fixes & Summaries for GM
Fix/Summary Answers
2000 Buick LeSabre Custom 3.8L abs VIN: IG4HP54K4Y
i havent got car back to the shop it looks like a must have a hub assembly cutting out at times thanks for the help
2003 Cadillac CTS 3.2L Oil Pan VIN: 1G6DM57NX3
IATN is the best!!! What a great resource we all have here. Thanks to those who replied. This was a case of 'fear of the unknown' being there is no 'good' way to hang the engine (front fender kind of float and give no solid brace to set a hanger on) and th...
1994 Chevrolet Camaro Z28 5.7L Possibly ABS module VIN: 2G1FP22P8R
After inspection and or replacement of all the components in the brake system with no change we began to inspect other examples of the same model and have discovered that quite a few of them have the same problem. The condition is aggravated on our test subjec...
1994 Chevrolet K1500 Cheyenne 5.7L Hesitation, Cuts out VIN: 1GCEK14K3R
Well I had two issues on this one. The Delco fuel pump was bad right out of the box.Dead head pressure only 10psi. The next pump installed would hold over 20psi. With that issue solved I moved on to the ignition system. With the cap off I lined up the pointer ...
1994 Chevrolet C1500 5.7L Poor Idle Quality, Surge VIN: 2GTEC19K9R
Replace distributor shaft and stator. The magnet was cracked causing a little extra wiggle in the injectors. Also replace stator assembly and sparkplugs because they were fouled.
1995 Chevrolet K2500 Cheyenne 7.4L Clutch VIN: 1GCGK29N8S
After getting more involved with this vehicle after letting my tech try numerous things, I came to the conclusion that there simply wasn't enough travel in the hydraulic system. Attempted to bleed several ways...could not get any further air out of the system....
1997 Chevrolet Tahoe LS 5.7L Poor Idle Quality, Hesitation, Misfire VIN: 1GNEK13R3V
Hey guys Thanks for all the help, I found a vacuum leak caused by drooping intake gaskets, They had just fell far enough to mess up #5.This explains also why #5 plug was fouled, because it was sucking in oil. I dont think I ever had intake gaskets that caused ... Trouble codes: P0300.
2000 Chevrolet Venture 3.4L electric window VIN: 1GNDX03E2Y
want to thank jessy,chris and tim for your time.somehow in my haste i managed to miss a tsb on these windows.#00-08-64-007 is about window drag because of the weather strip fuzz wearing away and window dragging on bare have to look way inside where ...
2000 Chevrolet Silverado 2500 5.3L transfercase VIN: 1GCEK29U5Y
thanks to all who replies --- we changed the 4wd switch cuz thats what the coustomer wanted -- well he hasent been back im not sure if its fixed yet maby we will see the next rain storm
2000 Chevrolet Silverado 1500 4.3L Misfire VIN: 1GC2GWEBGY
Well every one, nobody told me life, cars and woman were easey iv'e been ASE Master tech for quite a while and notheing seems to amaze me but i was not going to stop until i fixed the ###@@@ truck I THANK EVERY ONE out their that has help me. Just to recap, Th...
2002 Chevrolet Silverado 2500 6.0L gas tank sucked in VIN: 1GCHK24U62
Well the majority of replies suggested the relocation kit for the vent valve, and replacement of the canister. I was not given the green light to replace the tank though, the $1400 price tag was too much for the customer to not gamble on using his old tank. I ...
2006 Chevrolet Monte Carlo SS 5.3L oiling VIN: 2G1WL16C26
Thanks for the input. The owner has contacted a lawyer and plans to sue. I think he's wrong but its his car and his money. Some thought it could be a ring problem or pcv problem. as soon as the word 'lawyer' came up I politely said goodbye/good luck.
1994 GMC C3500 Sierra SL 7.4L Poor Idle Quality, Stall VIN: 1GDJC34N6R
the fuel pressure was 17lbs replaced the pump and every thing is a ok!! thanks for all your help
2003 GMC Sierra 1500 SLE 4.8L Cuts out, Stall VIN: 2GTEK19V63
All it required was a reflash of the computer. thanks to all that helped it is GREATLY appreciated.Thanks again
1995 Oldsmobile Silhouette 3.8L Poor Idle Quality VIN: 1GHDU06L9S
We used the replies to cover some problems that we did not think of previously but did not find any other problems. When we finally got the van to act up in the shop we checked the continuity of the ground circuit to tps and found it to have very high resistan... Trouble codes: P0123 (TP Sensor High).
1999 Pontiac Montana 3.4L overdrive VIN: 1GMDX03E4X
Well its fixed. Most replys said the 4th clutch hub was stripped. It was. Removed side cover & then removed pump, valve body & channel plate as one assembly in the van. Clutch hub spun freely, pulled it out & yes it was stripped. I guess it was still good enou...
2000 Pontiac Bonneville SE 3.8L starter motor VIN: 1G2HX54K5Y
Thanks for all the help, the problem turned out to be a faulty ignition switch, installed new switch & problem solved, Thanks Brian
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