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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for October 12, 2005
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Open Help Requests for GM
Help Request Answers
1990 Cadillac DeVille 4.5L Stall VIN: 1G6CD5331L
A few days ago, customer drove 1 mile from home, engine stalled while driving 35 MPH, she cycled key, it restarted OK, drove it home and parked it. I went by today and read codes. I looked briefly under hood, battery cables look OK, ignition wires OK, fuel qua... Trouble codes: E52 (ECM Memory reset), F32 (BCM-ECM Data Problem)
1995 Cadillac DeVille Concours 4.6L No Start VIN: 1G6KF52Y3S
This 1995 Cadilac came in with a bad motor. We replaced the motor with a used motor.Motor did start and run but CEL is on with code PO83,crank sensor 24X refrance high.Found CKS wires had been repaired befor. Replace both crank sensors,both wire conectors and ... Trouble codes: P0083
2001 Cadillac DeVille 4.6L Poor Idle Quality, Surge, Stall, MIL Lamp on VIN: 1G6KD54YX1
This caddy has a rough, surging idle...constanly going from 500 to 650 rpm. It has codes 171 and 174 saying it is too lean. I have sprayed berryman all over it & found no vac. leaks, removed & plugged the egr, no change. ...EGO sensors all reading very low num... Trouble codes: P0171 (bank one too lean), P0174 (bank two too lean)
1983 Chevrolet K10 Custom 6.2L Surge VIN: 2GCEK14C7C
hey this is dads truck it fades at mid range & surges when shifting can't find any info in all data as far as fuel press before injector pump or volume my diesel histroy is in tractors so i m flopping like a fish thanx in advance cu db
1988 Chevrolet K1500 Cheyenne 5.7L No Start, Stall VIN: 1GCDK14K4J
good afternoon to all, please help! workin on a 1988 chevy 1/2 ton that is going through fuel pumps faster than it goes through gas! it is now possibly going to need its 9th pump. we got this truck after the other place got sick of the first 4 pumps going out....
1988 Chevrolet C1500 Cheyenne 4.3L Poor Idle Quality, Hesitation, Stall, Misfire VIN: 1GCDC14Z9J
Hello, This truck pops back thru the air cleaner when you try to drive it cold. I replaced pump & filter, no change.Once its warmed up, it runs like a top. I checked the TPS and MAP sensors, OK. No codes presernt. Ran a top engine cleaner thru it, thinking c...
1989 Chevrolet Motorhome 7.4L Power Steering VIN: 1GBKP37WXK
Owner is complaining of lack of power assist at idle, as well as brakes.
1995 Chevrolet Lumina 3.1L No Start VIN: 2G1WL52M9T
Checked vehicle and found interlock for the gearshift not working (cable damaged). Unplugged purple and black wire from interlock solenoid. Bridged and immediately dash lights went out as if blew a fuse. Checked everthing and still can't get them back on. Car ...
1996 Chevrolet Astro 4.3L No Start, Misfire VIN: 1GNDM19W9T
AAARRRGGH! Vehicle will start, run, poorly, roughly, with no SES light. Give it five minutes of idle, SES light on with CKP "A" ckt codes. Fine, installed new AC DELCO (updated) CKP sensor---crank no-start. Installed two other new ACD sensors (one old disc. st... Trouble codes: P0336 (p0339-), P0339 (testing and results)
1999 Chevrolet C2500 5.7L No Start VIN: 1GTGC24R2X
This vehicle when running runs good, but some times it wont start,check fuel pressure at no start and is 55psi. You can relieve pressure(maybe air, but it has no leaks outside of tank and pump is from dealer) at schrader valve and it will try to start, keep re...
2000 Chevrolet Silverado 1500 5.3L abs VIN: 1GCEK19T1Y
the problem is the abs actuates at about 5 mph while stopping.i have seen this problem before and is has always been a wheel sensor,when watching the sensors on a scanner the reading is 3mph before moving on all,they all read together till you slow down to abo...
2001 Chevrolet Malibu 3.1L MIL Lamp on VIN: 1G1ND52J71
2002 Chevrolet Trailblazer LS 4.2L Hesitation, No power VIN: 1GNDS13S42
Hello everyone, I'm stumped big time by this one. I looked every where for info on this vehicle and there's not to much out there so here I am. The customer complaint is that the vehicle has no power. We test drove the vehicle to verfiy the problem. It has abs...
2003 Chevrolet Suburban 1500 LS 5.3L speedometer VIN: 3GNFK16Z43
Thanks in advance for your help, iatn is a great resource. The customer states the speedo sometimes sticks at 40mph and sometimes drops to 0 and stays there, of course it did not act up when I had it. But the needle jerks all the way up and down. I scanned the...
1995 GMC Yukon SLE 5.7L Excessive Emissions, Hesitation, Cuts out, Misfire VIN: 1GKEK13K5S
Looking for any ideas that can help.I've beat my self up good on this one.Is there a GM lord out there! This Yukon boggs down when accelerated, like running out of fuel, or plugged exaust.You can accelerate moderately to heavily and it will bog down, when heav...
2001 GMC Jimmy SLE 4.3L MIL Lamp on VIN: 1GDT13WO12
If anybody can help it would be surely appreciated. I have 4.3l engine that sets a P0101 code( mass air flow performance). The setting of the code happened once a month with nothing found. It is now setting every 2nd ignition cycle. The manual says to check f... Trouble codes: P0101 (mass air flow performance)
2002 GMC Sonoma SL 2.2L MIL Lamp on VIN: 1GTCS14582
Hi everyone, I'm posting this for a neighbor whose computer is down. Found trouble code #P0410 and water in air pump. My neighbor performed repairs per TSB #04-06-04-015. Sorry that I don't have the exact info on the TSB, but evidently there have been some rev... Trouble codes: P0410 (Secondary Air Injection System)
2002 GMC Savana 2500 5.7L MIL Lamp on VIN: 1GTGG25RX2
Hello to all, I have just installed a new distributor in this 2002 GMC Savana due to a worn drive gear and shaft bushings. It now will start and run fine, but immediately sets a cam/crank sync code. The problem is, my Genisys will not give me "cam retard" data... Trouble codes: 1345B (Cam / Crank correlation)
1988 Oldsmobile Cutlass Calais 3.0L Cuts out VIN: 1C3NF54L5J
Hello Iatn Members, I have this vehicle driven for so many miles. Customer never tell my service advisor that vehicle just die when put in gear except part and neutral. His complaint was vehicle would bog when accelerate. I couldn't confirmed with a several m...
1995 Pontiac Firebird Trans Am 5.7L no start 1st crank VIN: NO VIN
This car has already left the shop. We have installed several performance upgrades. High Flow intake system, High flow MAF sensor, Headers and exhaust, MSD ignition system, Baer Brake system, Hotchkis Suspension, and a chipped ecu. Customer took it to a dyno, ...
2002 Pontiac Grand Am SE1 2.2L Won't run monitors VIN: 1G2NF52F32
Customer came in originally because of a check engine light on. Car was just recently purchased. Found code P0130 oxygen sensor malfunction. Tested and found upstream oxygen sensor not switching. Replaced oxygen sensor and retested, new oxygen sensor operates ...
1995 Saturn SL2 1.9L Poor Idle Quality VIN: 1G8ZK5274S
After vehicle warms up lopes at idle,bad - idle air motor seems to open up - idle air counts are normal and does not change when starts to run bad -can unplug idle air motor and runs normal - no vacuum leaks - have ruled out computer - have replaced ignition m...

Fixes & Summaries for GM
Fix/Summary Answers
1990 Buick LeSabre 3.8L Surge, Cuts out, Stall VIN: 1G4HR51C8L
pcm fixed this one.used prom from doner pcm along with pcm the original prom would cause the car to stall but with the new prom car runs great.
1990 Buick Skylark Custom 2.5L Cuts out, Misfire, MIL Lamp on VIN: 1G4NC54U3L
thanks for all the help. new prom took care of problem. stands to reason if computor was fried, prom should be too. again thanks!
1990 Buick Riviera Luxury 3.8L Cuts out, Stall VIN: 1G4EZ13C3L
thanx to all who replied found that a fuse link had corroded almost to the point of becoming detatched. replaced fuse link and all is well. thanx again for a great site. iatn is priceless tool to have access to.
1991 Buick Riviera Luxury 3.8L Surge, Cuts out, Misfire VIN: 1G4EZ13L7M
thanks to all that replied for your help. the problem was either the fuel system and the cleaner finally broke down the deposits, or the weather cooled off enough that the car stopped acting up. the fuel gauge on the dash is inaccurate so it may have been star...
1997 Cadillac Catera 3.0L Misfire VIN: WO6VR54R1V
Thanks for all the replies. After I posted the help message the car would not skip at all. We drove the vehicle several times and tried to duplicate customer driving habits. However the skip never returned. We read all replies and performed tests accordingly. ... Trouble codes: P0306 (cylinder number 6 misfire).
1998 Cadillac DeVille 4.6L Cruise control VIN: 1G6KD54Y1W
I recieved very little help on this one. Customer did not want to spend a lot of money, so I told him not to use the cruise control and then see if the fuse still blows. He has not got back to me, not sure if this is a good thing or not. If I do fix it I will ...
1998 Cadillac Catera 3.0L po1870 VIN: W06VR52R3W
Just wanted to let you know we gave up and bought a used transmission and it corrected the problem.We replaced the pump,converter,solonoids,borrowed tech 2,and basically tried everything we could think of.We figure it had a leak in the case.Thanks for the repl...
1997 Chevrolet Astro 4.3L Misfire VIN: 1GNDM19W6V
Thanks for all the help. It wound up being the injectors.I have had a lot problems with these injectors but this one acted diffrently to me and I couldnt make the connection. I found a buliton and sent the customer to the dealer. the dealer coverd it under an ... Trouble codes: P0305.
2002 Chevrolet Trailblazer LS 4.2L Lighting VIN: 1GNDT13S52
thanks to all who responded!! i replaced the aftermarket headlamp bulb with an ac delco bulb as e few of you recommended and surprise!! no more burned wiring harness connectors. thanks again for taking the time to respond. mark
1987 GMC R1500 High Sierra 4.3L No Start, Cuts out, Stall VIN: 1GTCR14ZXH
Well I appreciate everybodys response,,and I am really embarrased about this,,I broke one of my cardinal rules 'never assume the last tech actually did what he said',,since this truck was towed to us from another shop and I know the guy who worked on it last I...
2002 GMC Safari SLE 4.3L abs VIN: 1GKEL19X42
replaced left front sensor (although i didn't see anything wrong with it) and problem is gone. the scanner would not read this failure at slow speeds. i was worried i would have to eat the $145.00 sensor, but it is fixed. Thanks to Marvin from Minnesota for ...
1995 Oldsmobile Silhouette 3.8L Misfire VIN: 1GHDU6L9RJ
I first would like to thank all of the 30 guys who responded. First of all yes the bosch junk plugs were replaced with delco and no help to problem.I had scoped alternator and had found a bad diode in alternator and cust supplied his own unit and that took car...
1997 Oldsmobile Aurora 4.0L Stall VIN: 1G3GR62C8V
customer is always out of town. i have not seen the vehicle since i posted the request,,, if i get the car in i will post as a fix and let you guys know what it is
1998 Pontiac Grand Am SE 2.4L steering wheel VIN: 1G2NK4DTYW
I performed the bullitain per G.M. and it fix it. G.M. says to remove the rack but I was able to replace the pinion shaft seal and bearing by quickly removing the steering column. John thanks for your reply but i didn't see a dust shield but maybe i may have d...
1992 Saturn SL1 1.9L MIL Lamp on VIN: 97NZ183144
Well that was a great bunch of help I must say.Yes the intake manifold gaskets were leaking air as most of you thought!I'm afraid that I was so busy with other jobs that I had to get another tech to do the actual gasket job after performing diagnosis[only had ... Trouble codes: 35 (idle speed error), 49 (idle spped error).
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