Two problems related to engine rattling and whining sounds have been reported for the 2002 Chevrolet Blazer. The most recently reported issues are listed below.
: the contact stated after parking the vehicle for a few minutes, the vehicle would not restart. When the key was turned in the ignition the engine would not turn over but only made a whining noise. The vehicle was towed to an independent repair shop, upon inspection the engine had seized. The timing chain had fractured, the sparks plugs had melted and the pistons had failed. The dealer and manufacturer were alerted.
After engine has warmed up, there is a constant enging/tapping/rattle noise similar to the sound that bad lifters make. This sound is prevalent under all conditions and more pronounced on acceleration. I brought it to the dealership several times and they indicated it was a normal sound per detroit. Detroit has a document id#843248 that addresses this problem. I complained to gm and they have extended the warranty on the engine to 100,000 miles or 11/27/07 whichever comes first. I am still not satisfied as the noise is consistent and an irritant. I have looked at your site for other similar complaints and do not see any. There must be a mechanical fix to this problem but it is being ignored. The engine sound has increased since it was first noticed indecember, 2002 and reported to the dealership.