39 problems related to manifold/header/muffler/tail pipe have been reported for the 1999 Chevrolet Malibu. The most recently reported issues are listed below.
Intake manifold is leaking fuel.
The manfold intake gasket started leaking anti-freeze and I was told I had to pay for it to be replaced. GMC is aware that it is a problem and have a technical bulletin on it. They are aware that this is a problem but have failed to do anything about it. I feel that there should be a recall placed on the vehicles and anyone who has paid for the vehicle to be repaired should get reimbursed for the repairs as well as the rental.
Bought this car with 23,000 miles on it in Jan. 2000. Within a few months, brakes started vibrating bad ly when applied at high speeds. Dealer said faulty, warped rotors and replaced them free b/c it was a manufacturer's defect. Few months later, April 2001, they did it again. Took back to dealer, they refaced the faulty rotors, put new pads in, charged me $300. In Jan. 2002 brakes did it again. Dealer gave me the runaround and wouldn't do it free, so I got good rotors and pads at parts store for $120 and did it myself. Also intake gasket leaks antifreeze. Chevy needs to do something about brakes and I want $420 back from them.
Plastic intake manifold gaskets developed cracks which let the engine coolant leak inside engine. General motors did admit there was a problem and there was a recall, however it did not apply to the consumer vehicle.