The contact owns a 2005 GMC Sierra 1500. The contact noticed severe rust to the subframe of the vehicle. The contact stated that the rear suspension, front suspension, and starter support showed excessive rust. Additionally, the shock tower, supports, transmission bolts, four wheel drive actuator, and hardware also showed excessive rust. The contact also stated that the horn also failed to operate intermittently. Beckley auto mall (3934 robert C byrd dr, beckley, wv 25801, (304) 252-3300) stated that there was no recall associated with the VIN. The vehicle was repaired for several failures; however, the rust issue was not addressed. The manufacturer was notified of the failures. The approximate failure mileage was 96,000. Updated 9/18/18

- Beckley, WV, USA

Castech cylinder heads on 2001 through 2006 5.3L vortec engines are porous and allow antifreeze to seap into the oil. This is a safety concern as it can destroy the engine (oil doesn't lubricate correctly, sludge buildup) and leave someone, at the least, stranded, at the worst, it can cause a huge engine fire. GM has been aware of this since 2007. They issued a bulletin describing the problem and what needs to be done to fix, but no recall. To fix either the cylinder heads need to be replaced ($2500) or the entire engine needs to be replaced ($5500). My vehicle is a 2005 GMC Sierra 1500 sle. Also the problem has been confirmed by a licensed mechanic. The following is a link to the GM issued bulletin. WW2.justanswer.com/uploads/bluegorilla/2008-12-05_142924_coolant_loss_5.3.pdf

- Boise, ID, USA

Concerning GM 706 castech cylinder heads/GM tsb 06-06-01-019B I have a 2005 GMC Sierra which has slowly been leaking coolant for about 6 months. I have had it looked at and the dealer informed me that I have a 706 castech cylinder head that is notorious for cracking and leaking. The dealer told me there was coolant inside my oil and recommended replacing the engine. As I have begun researching this issue I realize these cylinder heads affect millions of GM vehicles and loyal customers. GM has issued a tsb and are aware of the issue at hand and in my, and many other customers this should have been a recalled item. I am calling on GM to fix this issue/mistake.

- Pekin, IL, USA

The contact owns a 2005 GMC Sierra 1500. When the vehicle was placed into gear, the contact noticed that the gear selector was barely illuminated. The failure progressively worsened and the contact had to memorize in what gear the vehicle was placed. The vehicle was not taken to a dealer. The manufacturer was made aware of the failure. The failure mileage was 138,000. Updated 06/15/16 the consumer stated the led shift indicator display had faded, and he was unable to determine what gear the vehicle was in. Updated 06/22/16.

- Laura, OH, USA

Four wheel drive functions intermittently. Replaced switch and transfer motor. Every 6 months four wheel drive becomes inoperative often after a highway run. Costs to repair have exceeded $1000. Conversations with other owners of similar vehicles, including Silverado, experience similar issues.

- Brighton, MI, USA