Brakes
Thread Starter
Intermediate
Joined: Dec 2006
Posts: 47
Likes: 3
From: Brea CA
Brakes
I have a C-5, 2002, mainly stock with stock wheels. I had a pulsation in my brake pedal which indicated the front rotors were warped. I purchased the Napa slotted/drilled rotors and ceramic pads. With less than 100 miles on the new rotors, the pulsation is coming back. The parts store said they will check the runout on my old rotors and the new ones, then give me a new front set. But, I am not sure why the problem is back. Is it a proportioning valve problem, or something to do with the handling system? Your help is appreciated.
Tech Contributor
Joined: Jan 2007
Posts: 19,245
Likes: 1,092
From: Dyer, IN
I have a C-5, 2002, mainly stock with stock wheels. I had a pulsation in my brake pedal which indicated the front rotors were warped. I purchased the Napa slotted/drilled rotors and ceramic pads. With less than 100 miles on the new rotors, the pulsation is coming back. The parts store said they will check the runout on my old rotors and the new ones, then give me a new front set. But, I am not sure why the problem is back. Is it a proportioning valve problem, or something to do with the handling system? Your help is appreciated.
Le Mans Master
Joined: Dec 2006
Posts: 7,251
Likes: 16
From: Phoenix Arizona
it is probably uneven brake material on you rotors. you have to bed them in just right or you get uneven deposits on the rotors and the feel like they are warped. try hitting your brakes real hard jujst above kicking in the ABS system from 60 to10 about 5 times in a row. then let it sit for 30 minutes and go drive it again and see if it is better. learned this at Stoptech site. those guys are smart!
your brake pads may be too soft too, might want to try harder pads...do not use hawk HPS
hawk plus are greeat 
the gm stock pads are very good too
anytime my brakes do this i hit them hard from 140 mph to 45 mph then they work fine
your brake pads may be too soft too, might want to try harder pads...do not use hawk HPS
hawk plus are greeat the gm stock pads are very good too
anytime my brakes do this i hit them hard from 140 mph to 45 mph then they work fine
Safety Car
Joined: Jul 2004
Posts: 3,904
Likes: 28
From: Vancouver Washington
it is probably uneven brake material on you rotors. you have to bed them in just right or you get uneven deposits on the rotors and the feel like they are warped. try hitting your brakes real hard jujst above kicking in the ABS system from 60 to10 about 5 times in a row. then let it sit for 30 minutes and go drive it again and see if it is better. learned this at Stoptech site. those guys are smart!
your brake pads may be too soft too, might want to try harder pads...do not use hawk HPS hawk plus are greeat
the gm stock pads are very good too
anytime my brakes do this i hit them hard from 140 mph to 45 mph then they work fine
your brake pads may be too soft too, might want to try harder pads...do not use hawk HPS
hawk plus are greeat the gm stock pads are very good too
anytime my brakes do this i hit them hard from 140 mph to 45 mph then they work fine
That fixes my vert every time my wife has been driving it for a while.
