Three problems related to engine clicking and tapping noises have been reported for the 2002 GMC Envoy. The most recently reported issues are listed below.
When starting the truck there is a very noticeable ticking sound coming from the front of the engine. The ticking will continue until the vehicle warms or for a max. Of 3-5 min. Accelerating the engine will not stop the ticking. Inquiries revealed other Envoy owners are experiencing the same problem. What is the causing the problem. Reply needed as soon as possible.
Driving on road and heard loud clattering noise and then engine died. Lost all power! brought to dealer by flatbed and found camshaft broke off due to loss of oil. Dealer is supposedly fixing problem. 35,000 miles on it. Just bought in March of 04. We think it is engine defect.
When the vehicle was started a ticking noise was heard for 1-2 minutes. The driver drove the vehicle to the dealer for inspection. The mechanic informed the driver that the problem could not be duplicated and that the vehicle was operating normally.