GM Automotive Technicians Technical Discussion and Fixes for Apr 14, 2004

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Open Help Requests for GM

	Help Request	Answers
	1994 Cadillac DeVille 4.9L MIL Lamp on VIN: 1G6KD5287R This came in with a code P085, Idle Throttle Angle Too High. I checked TB and found it to be coked bad. I cleaned TB and cleared codes. Light was back on almost instantly. I Adj. TPS twice to no avail, Adj. ISC, performed Idle Learn twice and it still comes ba... Trouble codes: P0085	View
	1978 Chevrolet K30 Cheyenne 5.7L burned clutches This is a friend of mine and this vehicle is a rock crawler Toyota land cruiser with a GM drive train, a 400 turbo with a 205 transfer case and a 350ci.Tire size is 35" and the trans was aremanufactured unit prior to the installation in the Toyotait has a low ...	View
	1988 Chevrolet K1500 Cheyenne 5.0L spark knock VIN: 1GCDK14H5J Customer says he was driving truck one day and it started spark knocking. Timing has ben double checked, and if you unplug the set timing connector, the spark knock goes away. I have been all through this one (see list of parts changed) and cannot get rid of t...	View
	1989 Chevrolet S10 2.8L Excessive Emissions, No Start, Poor Idle Quality, Cuts out, Stall VIN: 1GCCS14R1K this vehicle came in as a rough running slight hestitaion surge. upon inspection found needed minor tune-up. performed tune-up with fuel injection service. since this time vehicle will start,run, and stall. ran fuel pressure test, spark test, code check, iac t...	View
	1990 Chevrolet C1500 Cheyenne 5.0L compressor clutch VIN: 2GCEC19H5L Problem I am experiancing is that at connector for compressor clutch I have 13 volts with pigtail disconected checking from power feed end. I think this should be sufficent. Once the pigtail is connected for the clutch it will not cycle. Check of voltage when ...	View
	1993 Chevrolet Camaro Indianapolis 500 Pace Car 5.7L Stall VIN: 2G1FP22P2P hi guys i hope there is someone out there that lead me in the right direction. ok here is the problem this car start and stall after two second i replace the distributor,ignition module,new gm ignition key and computor and prom and still have the same problem ... Trouble codes: 41 (est open)	View
	1994 Chevrolet K3500 6.5L No Start I am just now stepping out on my own as an Oklahoma small business owner. They say 50 is the magic age... Ha!!! I broke one of my own rules... on the aqdvice of a diesel shop technician, I replaced injector driver module (I did not test the module myself, now ...	View
	1997 Chevrolet Express 3500 5.7L Engine VIN: 1GTHG39R4V OK I need help with this one big time. i have had this for 3 days and cannot figure anytning out. This van gets a vibration in the engine at about 1100 rpm literally shakes the floor, the van does NOT need to be moving..power brake it and bring up the rpm's an...	View
	1999 Chevrolet Tahoe 5.7L Misfire, MIL Lamp on VIN: 1GNECI3R6X Customer complaint of MIL and misfire under load conditions. With a scanner attached, I tested under loaded conditions and found cyls. #5 & #7 misfire counters winding upward with associated engine roughness. Backing off the throttle brought misfires to zero a... Trouble codes: P0300 (Random/ Multiple Misfire)	View
	2000 Chevrolet Impala 3.4L abs light VIN: 2G1WF52E81 problem child here. This car gets an erratic abs light on, then off. code p1233(r/frt speed sensor) sets. First time it was in the shop, I found 3 speed sensors to be out of spec ohms. replaced, fixed for a couple weeks. Then light flickered again, ran Diagnos...	View
	2001 Chevrolet Camaro 3.8L Fog lights VIN: 2G1FP22K51 This is probably a simple problem that I am overlooking but here it is. The fog light switch and the ASR switch located in the center of the IP above the radio gets too hot to touch. The back of the switches remain cool and the front gets hot. I realize that s...	View
	2002 Chevrolet Malibu 3.1L Fuel gauge, temp gauge, key fob VIN: 1G1ND52J52 Hi all Chevy techs, this vehicle came in with the fuel gauge, temp. gauge and remote unlocking key fob all inoperative. Checked all fuses and looked for a common circuit. All seems ok, unable to get a manual as my little town has no Chevy dealer. Maybe someone...	View
	1995 GMC Jimmy SL 4.3L transfer case VIN: 1GKDT13WXS Vehicle came in with a horrible droaning vibration and a squeak.Pulled front drive shaft and re drove vibration gone.Sent shaft out they said it was definetly bad. Replaced shaft and 80% of vibration is gone but im still not happy.It is only under acceleration...	View
	1997 Oldsmobile Cutlass 3.1L hard start VIN: 1G3NB52M9V cranks, cranks, cranks starts, if you press accelerator starts easier, no codes, im reading mass air flow o.oo, installed new sensor same thing, wiring intact, 12 volts on pink, .002 voltage drop on black ground, and 4.4 volts on yellow signal wire, also 2.3 h...	View
	1990 Pontiac Bonneville LE 3.8L MIL Lamp on VIN: 1G2HX54C9L Hi and thanks for checking this one out! This car came in with the check engine light on. Had codes 63,64 and 65 stored. We have cleared these codes and they at different times will return. Not all together. Light only comes on during decel which I now know is...	View
	1995 Pontiac Grand Am SE 2.3L No Start VIN: 1G2NE55095 car came to me no start, no injector pulse, no spark, replaced crank sensor, and module with no results, checked all connections and they are good. power and ground to module is good ohm readings on crank sensor is good a/c volt reading from crank sensor is in...	View
	1998 Pontiac Bonneville SE 3.8L wont start good fuel VIN: 1G2HX52K9W have good fuel good spark sounds like pop through intake have coolent in throt. body have good comp. 150 across the bord coolet temp. sen. is where it should be if you have any info. thanks joe	View
	1996 Saturn SL2 1.9L Hesitation VIN: 1G8ZK5273T this vehicle came into the shop with a tip in hesitation in closed loop. a technician in the shop tried known good coils, ignition module, fuel rail, crank sensor, egr valve, pcv valve, map sensor, t.p.s. , cleaned throttle plate, iac motor, o2 sensor , top en...	View
	1998 Saturn SL2 1.9L oil consumption VIN: 1G8ZK5270W hi guys i have this saturn which uses a qt. of oil every 1000 miles or so. there is no external oil leaks on the motor or no oil present in the coolant in the rad or the resivor bottle. the exhaust is normal color can not see any hint that it is burning the oi...	View

Fixes & Summaries for GM

	Fix/Summary	Answers
	1998 Buick Century Custom 3.1L Abs VIN: 2G4WS52M4W Hi, The customer decided not fix the car for this problem is intermitly happening. Like I stated in the post the reading were taking with the car moving slowly and the brake applied.The concern I had was with the rf amp reading why did it stay high compare t...	5
	2000 Cadillac Seville SLS 4.6L TCC solenoid VIN: 1G6KS54Y7Y Thanks for all who replied.Customer took vehicle to trans shop.Will post update when we hear from customer.	10
	1990 Chevrolet Corsica LT 2.2L Poor Idle Quality VIN: 1G1LT54G4L i have not got back to the car yet to try a couple of things that were suggested. i will return in a couple of days with fix.	10
	1994 Chevrolet Astro CL 4.3L Hesitation, Cuts out, Misfire VIN: 1GNDM19W1R I want to thank everybody that reponded. It was the Injector after some addtion test and scan readings. Thanks	8
	1995 Chevrolet K1500 5.7L Cuts out, Stall VIN: 2GCEK19KXS A new distributor fixed the problem, i checked it by visual inspection of the magnet cracks and voltage test at the pickup coil wires, less than a volt coming out, although i tested the new distributor and i got even less voltage .8 original and .3 on new so t...	11
	1996 Chevrolet Caprice Classic 4.3L Misfire, MIL Lamp on VIN: 1G1BL52W0T Dear Members, Thank you again for all of your help. Many of you said that they have seem many problem with headgaskets recently. I never thought of this because there was no coolant on old plugs when I tuned it up, and no smoke out of tail pipe. I did notice... Trouble codes: P0300.	18
	1997 Chevrolet S10 2.2L starter VIN: 1GCCS1444V Several replies asked about a remote starter setup or antithief system gone awry. We found niether. Used a tone generator to trace wiring behind dash and under hood. Only extra circuit went to SRS module. So we sent 12 volts there and blew the air bags(NOT--- ...	6
	1997 Chevrolet Express 1500 4.3L engine boggs VIN: 1GCFG15W5V guess what fixed my problem it was a combonation of a cam sensor and fuel filter.the cam sensor was at -7deg. and the fuel filter looked like it had mud inside even though it only had 20,000 miles on it.i know i over looked something.thank alot to all that gav...	23
	1997 Chevrolet Lumina 3.1L No Start VIN: 2G1WLV52M9 As it happens, the wires on the plug into the ICM had worked their way out of the plug just enough to not make contact. Thanks to Tim [...] for responding. This was so frustrating since it had run great and just flat out stopped. Up a...	2
	1998 Chevrolet K1500 Cheyenne 5.7L MIL Lamp on VIN: 1GEK13R9WR thank you for all your help we got the truck back from the customer but the engine in your replies help allot god bless have a great day Trouble codes: P1345.	31
	2001 Chevrolet Silverado 3500 6.6L Hard start VIN: 1GBJK34161 I've spoken with OTC about this, they give me the 'wait for Pathfinder 04' runaround. Needless to say, I'm not real happy about this. Thanks for the help!	4
	1999 GMC Jimmy SL 4.3L front axle VIN: 1GKDT13W9X thanks everyone for your help, especialy mike from n.j. you were right on the money. i replaced the tccm first and the truck would have 4wd hi and auto 4wd, and the light turned off and the switch stoped flashing. i then replaced the shift motor and everything...	7
	1995 Pontiac Grand Am SE 2.3L No Start, Cuts out, Stall VIN: 1G2NE15D5S thanks everyone for the e-mails---the vehicle is still not repaired.have moved vehicle to leopard row for now--	8
	1996 Pontiac Grand Prix SE 3.1L altenator VIN: 1G2WJ52M7T I tried just about every suggestion that was posted, and in the end it wsa faulty wire that was shorting out and buring up the altenators. Thank you all for you help	17
	1999 Pontiac Sunfire GT 2.4L Poor Idle Quality, Surge, Misfire VIN: 4G2JB32T2X well i would like to thank every one for the help ,looks like i will look into the ign a little further sounds like most of you have had problems with cross firing in the tower and bad coils .	10
	2003 Pontiac Grand Am SE2 2.2L Radio Locked VIN: 1G2NF52FX3 I was thankful for all of the helpful information that was sent from other members. Unfortunately, most members were not aware that this vehicle was a 'Vin lock' radio. It looks at the vin number of the vehicle and compares it to the stored vin. If the vin doe...	21

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