Four problems related to engine and engine cooling have been reported for the 2004 GMC Sierra 1500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 GMC Sierra 1500 based on all problems reported for the 2004 Sierra 1500.
Tl the contact owns a 2004 GMC Sierra 1500. The contact stated that the valve head was cracked and the anti-freeze was depleted; however, there were no visible leakage. There were no warning indicators illuminated. The vehicle was taken to an independent mechanic who stated that the engine needed to be replaced. The local dealer and manufacturer were not contacted. The vehicle was not diagnosed or repaired. The failure mileage was 131,000.
Cracked cylinder heads, also known as castech head casting #706 these heads crack on the engine cause antifreeze to mix with the oil and destroy the engine, I have contacted gm and they will do nothing for me, even though there has been lawsuits and its a very well known problem with the vortec 4. 8 and 5. 3l gm engine.
The contact owns a 2004 GMC Sierra 1500. The contact stated that while driving 20 mph, he heard a noise coming from the engine. The vehicle was taken to the local mechanic, who stated that the failure was due to the cylinder heads being cracked, causing the engine to lose oil and coolant. The local mechanic replaced the cylinder heads, the gasket kit, bolts and nuts. The manufacturer denied assistance with the repairs. The failure mileage was 78,000 and the current mileage was 79,520.
I hear a tapping of the valves when the car is on. Also the speed ometer will stop registering how fast I am going.