Problems with 2004 GMC Sierra 1500 ENGINE AND ENGINE COOLING

Tl* the contact owns a 2004 gmc sierra 1500. the contact stated that the radiator did not have a peacock to drain its coolant from. an authorized dealer was notified and the contact was informed that the manufacturer stopped using peacocks to save money. the contact expressed concern over the situation because it could lead to a failure of the radiator. the failure and current mileages were 28,000. the vin was unavailable. i was informed that the lower radiator hose must be removed to change coolant. in doing so the hose can be destroyed and coolant could be spilt on the ground. updated 10/11/2011 *ln *tr

Tl* 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 speedometer will stop registering how fast i am going. *tr

I own a 2004 gmc sierra 1500 that is currently being repaired for cracks in both engine heads. the truck has 90,000 miles on it and i have kept up on all necessary maintenance. the problem began approx. 2 months ago when i noted a knocking sound after starting the truck cold. the knocking would dissipate after the truck warmed up. i was told the sound was caused from dirty lifters and not to be concerned as long as sound dissipated after it was warm. upon having my oil changed 2 days ago, coolant was noted in the oil. (hints the knocking) the heads were pulled and both were cracked around where the heads bolt to the block. in talking to the mechanic, the cast they used when making the heads was bad. apparently around the bolt holes, the aluminum is thin. gmc however accepted millions of these and are still using them today. the repair is costing me $3,400.00. *tr

Heater core/no heat sometimes/found carpet wet on pass. side. seems in checking around hardly never@47,000 mi. spent 1200.00 to replace it. apparently must remove seats, console,and entire dash to replace!!! im really,really made about this!! *tr

Engine failure 2004 gmc sierra service bulletin 06-06-01-019b internal coolant loss leak in cylinder heads mfg by costech lead to my engines death with just 89,000 miles. this is a know problem since 2004 and from other people i have learned gm will not cover expenses. *tr

Reduced engine power, this has happened about 7 times. when this happens the engine shuts down to 1500 rpms maximum. took to dealer, they told me that it was the throttle body valve and actuator assembly. this part was replaced at a cost of $481. within two weeks the same problem has happened twice more. this is dangerous when traveling in traffic. *tr

I also had to have the actuator replaced on my gmc 2004 truck. it was blowing hot when the a/c was on and should have been cooling. it was not cheap either, it also had to be recalibrated in the computer system. i didn't expect that to happen to a new vehicle. *tr