GM Automotive Technicians Technical Discussion and Fixes for Apr 8, 2004

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	Help Request	Answers
	1999 Cadillac Seville SLS 4.6L trunk & fuel door release Hello - Here goes - Have vehicle in shop but am at home. Forgot to bring VIN # home. That's the least of the headaches. Haven't really done a whole lot to this car - first time customer, long time friend. Some history of the car: At one time, the roof panel wa...	View
	1990 Chevrolet Camaro RS 3.1L Excessive Emissions, Poor Idle Quality, Stall VIN: 1G1FP23T4L Hello everyone. This is the first time I have requested help in fixing a vehicle so please bear with me if I make a mistake or two. This camaro is my in-laws' and it came to me with a crank no start condition. Upon initial inspection, I found the spark plugs w...	View
	1990 Chevrolet K2500 Cheyenne 5.7L Surge, Cuts out, Stall VIN: 2GCFK29K61 This truck originally came in for a no start and bucking when feathering the throttle. Replaced fuel pump to correct the no start. Bucking still occurs. Also replaced the distributor due to bad bearing cracking the pickup magnet. Bucking still occurs. Truthful...	View
	1992 Chevrolet K1500 Cheyenne 5.7L shift problems VIN: 1GCEK14K3N complete rebuild including, front pump(reman)convertor and some hard parts, flushed cooler. sonnax 4th super hold servo piston and servo release check valve. in d4 trans shifts 1 to 3 and no 4th. i have manual 1-2nd and manual 2-3rd. no 4th, rev is fine. i che...	View
	1995 Chevrolet Blazer 4.3L No Start, Poor Idle Quality, Stall VIN: 1GNCS13W4S Classic example of EGR sticking on this model engine. Install new EGR and verfiy that not a lot of carbon built up in passages, normal residue no large chunks of carbon seen. Clear codes and isntall new valve. Test drove with scanner and drove ok for a couple ... Trouble codes: 32 (EGR Error), 45 (Rich Exhaust)	View
	1995 Chevrolet K1500 5.7L Cuts out, Stall VIN: 2GCEK19KXS truck stalls, can hear rush of air from tbi unit, looses fuel, can keep running with starting fluid, injectors ohmed 1.5 each, fuel pressure 11 pounds constant, new pump and filter, pressure drops after pump stops?, need to know if i checked pick up correctly,...	View
	1995 Chevrolet Caprice Classic 4.3L Hesitation, Misfire VIN: 1G1BL53EQM gm techs i sure could use your help on this one! this car seems to run lean under slight load. checked timing and at cruise is about 28 degrees, slight acceleration will fall back to about 12 degrees. no knock signal is present except under hard acceleration,b...	View
	1996 Chevrolet Lumina 3.1L Misfire, MIL Lamp on VIN: 2G1WL52MXT Need help on where to go with a chevy misfire. This is a freind of the boss, so he doesn't want to hear that I can't find it.Car has had a history of a 300 code. Previous repairs have replaced plugs, wires and all 6 injectors. At idle, you can feel the engine ... Trouble codes: P0300	View
	1998 Chevrolet Malibu 2.4L No Start, Cuts out, Stall VIN: 1G1ND52T2W i have a intermitent stall on accelleration it will not restart untill key is cycled off then on sometimes it takes several tries. it looses spark and injector pulse i replaced module crank sensor and computor. then found i am loosing 5 volt reference signal o...	View
	1998 Chevrolet Astro 4.3L Poor Idle Quality, Misfire, hard start cold VIN: 1GNDM19W0W vehicle has been tuned,plug wires replaced, fuel pump assy.replaced with factory unit, fuel filter replaced,ignition coil was replaced. Tech- net services has been involved in our repair attempts, also note we had a different astro van in our shop with identic... Trouble codes: P0303, P0300	View
	1999 Chevrolet Silverado 1500 5.3L calipers VIN: 2GCEK19T9X Good Morning all, When you first start out on a test drive the brakes seem fine, after about 10 miles the front brakes wont release properly, pedal will feel much firmer and and both front brakes will overheat, rotors have blue spots from heat, My first inclin...	View
	1999 Chevrolet Express 3500 5.7L Misfire VIN: 1GBJG31R0X Came in for a miss #2&4 cyl. Replaced arcing cap, miss gone. Open loop it ran fine. When it shitched to closed loop I thought it was running out of fuel. Checked filter,OK pulled engine cover off and checked fuel pressure, It was ok and did not drop when "miss...	View
	1997 GMC Safari SLE 4.3L power steering pump VIN: 1GKEL19W7V we replaced a power steering pump in this safari, due to leaking. Followed bleeding procedures per alldata. still now power steering and hard brake pedal. this is a hydroboost system. We replaced the power steering pump with an A.C. delco pump. Followed same p...	View
	1999 GMC Jimmy SL 4.3L front axle VIN: 1GKDT13W9X check dtc c0367 from alldata flow chart, it tells me to replace front accuator but works fine manually with vacuum pump. i replaced solenoid but no luck. the solenoid does get vacuum. 4wd hi lamp flashes continually and service transfer case lamp on has anyone...	View
	1998 Oldsmobile 88 Royale 3.8L No Start, MIL Lamp on VIN: 1G3HN52K5W vehicle has a very intermintant problem,will start and stall,will keep running only if accelerator is pressed,will stall when accelerator pedal is released,only experianced problem one time car will act up maybe once a week,have towed vehicle in numerous times... Trouble codes: P0101	View
	2000 Oldsmobile Alero GL 3.4L No Start, hard start/needs thr VIN: 1G3NL52E5Y car will not start intermittently at any time or temp. unless the throttle is applied. car will keep cranking. fuel pressure o.k..	View
	2001 Oldsmobile Silhouette Premiere 3.4L evaporator VIN: 1GHDX03E11 Dear Friends, Back in a dealership for the first time in 20+ years! I've got to replace the front evaporator in this Silhouette, and it is very involved (7.7 hrs warranty time). My question is: does anyone know any tried and proven shortcuts or good tips on t...	View
	2001 Oldsmobile Intrigue GX 3.5L egine VIN: 1G3WH52H31 This car blows coolant out of the overflow when you rev the engine. we put the coolant pressure tester on and it goes well over 20psi. we suspect a head problem but when we leave presure on the system, the presure never droped and none of the cylinder are wet....	View
	1990 Pontiac Firebird Trans Am 5.7L Pings VIN: 1G2FS23F81 This car came with with the customer commenting on a lack of power and pinging. We replaced the plugs (the AC one recommended for the ZZ4) and the missing was gone but it still pings. Removed the upper intake and found the aftermarket egr valve had a broken va...	View
	2000 Pontiac Sunfire SE 2.2L No Start VIN: 1G2JB12431 fellow techs, the 2000 sunfire has been giving me fits.i have replaced the fuel pump.it ran for about 2 weeks and died.i am getting no voltage to the fuel pump.but my testing procedure could be of a bit.im about to lean towards a ecm.i dont know what else it c...	View
	1997 Saturn SC2 1.9L delay reverse VIN: 1G8ZH1274V trans was overhaul 8,000 miles ago delays & bangs in reverse only hot , cold trans shift fine line pressure ok thank for your help mike	View

Fixes & Summaries for GM

	Fix/Summary	Answers
	1995 Buick LeSabre Custom 3.8L Misfire, MIL Lamp on VIN: 1G4HP52LOS Thanks to all who replied Found Wires for Canister Purge valve Broken Repaired wires and no Check Engine light ! As far as the Bad running Did Fuel Pressure Check 10 Lbs Replaced Fuel Pump and all is well ! Thanks For Makeing a Good Day Better ! Trouble codes: 640 (QDM 1 Failure).	4
	1987 Chevrolet G10 Chevy Van 5.0L Hesitation, Surge, Cuts out, MIL Lamp on VIN: 2GCCG15H8H okay, here it is. Everyone had great advice, sometimes you feel like to look to deep into this stuff. Anyways I replaced the distributor with a know good one (ha ha). Magnets in old one had 2 splits wether it was the problem, who is to know. after this it ran ...	17
	1989 Chevrolet V2500 Suburban Scottsdale 5.7L Transfer case VIN: 1GNGV26K5K This was one of those I wouldn't believe if I hadn't witnessed. As mentioned in the first post, it has auto locking hubs, so there is no solenoid or vacuum unit on front differential. It's one of those systems that is so simple it's hard to believe you can't f...	9
	1993 Chevrolet Lumina APV 3.1L Stall VIN: 1GNDU06D6P Most all answers were on the money. We replaced the ignition switch and customer is happy. We did not answer sooner because we wanted to be sure this fixed it. Again many thanks to all.	10
	1996 Chevrolet Monte Carlo Z34 3.4L Poor Idle Quality, high idle VIN: 2G1WX12X3T I wanted to make sure of the fix so I waited until I was 100% for this posting. I had diagnosed this down as far as I could and surmised a bad ECM must be the problem. I had to have the new computer reflashed anyway so I passed this vehicle on to a GM dealersh...	27
	1996 Chevrolet Express 1500 5.7L jerk on re-accell. VIN: 1GBFG15R5T The van is fixed - 3 of you have obviously been there, done that - we had done an intake manifold and inadvertantly got two of the injection poppet nozzels crossed (they are numbered - shouldn't have happened). Apparently the fuel is injected into the wrong ho...	11
	1993 GMC C6000 6.0L No Start VIN: 1GDE6H1P9P Ok when I said I was getting spark, I was not. I saw spark through the spark tester but it was not enough to fire at the plug. So we got a no spark - no pulse situation. I applied ground on the 'A' terminal at the ALDL connector and I heard relay & spark like ...	4
	2000 Oldsmobile Intrigue GL 3.5L MIL Lamp on VIN: 1G3WS52H9Y Sorry guys; I did not fix this one. I cleaned the connections at the under hood fuse panel and on the AIR pump motor. I drove this car for six days, and no light. When the people drove it back to their house the light came on. They said they are going to liv... Trouble codes: P0410 (Secondary AIR Problem).	7
	2000 Pontiac Montana 3.4L abs & ? VIN: 1GMDX03E3Y came down to replacing computer for abs abs system. one of those freaky one that you just had a gut feeling on i guess. replace ebcm and averything seems fine at this time. thank you to all the responses.	5
	1997 Saturn SL2 1.9L engine VIN: 1G8ZJ527XV I greatly appreciate the e-mails I received. They helped me to make sure were the noise was coming from. It seemed to travel around the more I listened to it.So, we decided to lift the car on the hoist to listen underneath. It seemed to be louder near the bell...	4

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