1999 Chevrolet Silverado 1500 engine problems

Filed Sep 29, 2021 · Engine · 124,000 miles · WA

The contact owns a 1999 Chevrolet Silverado 1500. The contact stated that while driving 50 MPH, the vehicle stalled. The contact stated that an unknown warning light was illuminated during the failure. The contact was able to restart the vehicle and drove the vehicle to the dealer. The dealer performed a diagnostic test but was unable to retrieve a fault code. The contact also stated that while driving 60 MPH, the vehicle stalled. The contact was able to stay in the lane with the assistance of the police and other drivers for approximately 10 minutes before restarting the vehicle and resuming normal functionality. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 124,000.

Filed Oct 1, 2018 · Engine, Seats · 142,000 miles · TX

Tl* the contact owns a 1999 chevrolet silverado 1500. The contact heard an abnormal knocking noise while starting the vehicle. In addition, the driver and passenger side plastic rollers were fractured and caused the seats to move. There were no warning indicators illuminated. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was 142,000.

Filed Aug 2, 2018 · Electrical, Engine · 110,000 miles · AZ

Passlock system engages without cause. When starting my truck, it acts like it will and then shuts down after a second, and then the security light comes on. This is common with past lock system errors. This happens about 1 out of 4 starts. To get the car started, I have to go through a reset process that takes over 30 min, which causes battery drain. This has left myself and family members stranded in unsafe situations several times. Most recently I was stuck on the side of the highway, after stopping to change a flat at 11pm. After not starting with these same symtoms, while trying to do the 30min. Relearn process, the battery did not have enough to start the truck. So I was then stuck there for 3 more hours waiting on a tow truck for a jump. I was stranded for over 3 1/2 hours. This issue has been happening for the last 2 years, and have spent about 4k dollars to try and fix it.

Filed Jun 22, 2018 · Electrical, Engine · FL · fire

Tl* the contact owns a 1999 chevrolet silverado 1500 (gmt800). While the vehicle was stationary, an abnormal odor was detected inside the cabin. The contact attempted to open the hood, but the latch failed to release the hood. Also, flames were seen underneath the hood. The contact believed the fire originated from the fuse box, which burned the engine wire harness. The fire was extinguished by the fire department. A police report was filed. There were no injuries sustained. The vehicle was towed to the contact's residence. The vehicle was not destroyed. The vehicle was not taken to a dealer or independent mechanic for diagnostic testing or repair. The manufacturer was not made aware of the failures. The failure mileage was unknown.

Filed Jul 14, 2014 · Engine · 147,000 miles · CA

Noticed that the front left exhaust manifold bolt broke off; no one has ever touched this part so the bolt was installed as original. Searching the internet I found this is a major -- and known -- problem affecting millions of these engines. The patter starts with a bolt or two then culminates with more broken bolts, an exhaust leak, overheated catalytic converter, damaged parts and potential fires.

Filed Sep 8, 2012 · Engine · 165,000 miles · MA

Exhaust manifold bolts breaking by themselves, the heads have fallen off leading to exhaust leaking!

Filed May 9, 2010 · Engine · 89,000 miles · IL

Exhaust manifold bolts breaking off.

Filed May 3, 2010 · Engine · MD

1999-20?? Gm 5.3 liter engine. Left side exhaust manifold, last bolt back head has popped off. I have seen four other motors like this and have heard of several more. This allows exhaust gases to enter the cabin area posing a risk of co poisoning.

Filed May 1, 2010 · Engine · 195,000 miles · PA · fire

I have a 1999 chevy silverado which recently caught on fire 20 minutes after I got to work on wednesday morning. The vehicle is a total loss. The fire started on the drivers side in the engine compartment.

Filed Aug 27, 2008 · Engine · 107,000 miles · MN

I have a 1999 chevrolet silverado truck with the 5.3 liter v8. There has been an on going gradual loss of coolant with no apparent leak to be found. Upon further investigation the cause is due to the poor casting of the cylinder heads causing pressurized coolant to leak into the engine. The solution is to replace the castech (mfg) heads with new heads $1,100 each). Chevrolet is apparently aware of this common problem and has issued I believe service document 1986750. If gm is aware of this problem caused by the mis-manufacturing of the part a recall should be issued to all affected vehicles.