So if your gonna say " early ", ya gotta be more definite.Early trucks could be vacuum, but his is a 2000.
Early as in my '86 K3500 has hydro boost, and does have it. The 1948 two ton has a huge vaccum boost can for brake boosting.
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So if your gonna say " early ", ya gotta be more definite.Early trucks could be vacuum, but his is a 2000.
So if your gonna say " early ", ya gotta be more definite.
Early as in my '86 K3500 has hydro boost, and does have it. The 1948 two ton has a huge vaccum boost can for brake boosting.
Early trucks could be vacuum, but his is a 2000.
Be aware, that hydroboost taxes the power steering to add stopping power. So, when you stop the pedal hard at idle, it puts a higher load on the engine.
As long as it is only 50 rpm, I wouldn't be worried. You should get a similar drop if you hold the steering wheel against the stops.
I know my 05 Avalanche (had hydroboost) would drop a few RPM's if you pushed the pedal to the floor at idle. I don't think my diesel GMT-400's did, but don't have one to confirm with.