How many miles when this failed were on it?
My truck 2 year old @ 37K when I bought it:
1st WG solenoid failed @ 40K, a MAP sensor @ 60K, a vac pump @ 110K 2nd WG solenoid, somewhere in there a baro sensor, vac canister on turbo vac actuator got a hole in it and would not allow full vac to stay on the system 2 psi max boost with my fooler @ 130K-140K ??? not sure that one but it's demise drove me to permanent install the TM I had been keeping "just in case".
The vac pump went before the WG diaphragm (bought a replacement pump) all vac system components that left me stranded but I carried spares or would plug in my TM as backup WG diaphragm was "last straw".
I ran vac system until it was no longer viable to keep it up, then with a TM until going to ATT, the permanent solution :thumbsup:.
IMO vac system had good intentions but a weak link as GM was using available tech at time of design to make an more emissions friendly electronic controlled vehicle.
For it's time it was an okay design, I don't think GM ever envisioned that the 6.5s would still be "truckin" all these years later or possibly they would have made the components more "robust".
The problem we face with our "mature" vehicles is parts are worn and aftermarket replacements are "outsource" manufacture even if in a GM box bought at the GM store; so we get a mix of good and bad parts that possibly not built to same standards when GM had some warranty skin in the game and reliable repair parts they sold was a must.
How much pain is GM feeling over an "obsolete system" in their mind not enough to worry where replacement parts come from or how long they keep the vehicle fixed, add to that folks who want least cost pricing on parts and "discounted parts" and you get discounted repairs that last how long ?
GM IMO really would rather the "OLD 6.5s" would just go away as they hurt new vehicle sales, why do you think "cash for clunkers" got so much support.
So one can "band aid" their aging vac systems, and keep them viable, and even make tunes for them and get a good result.
My burb had 130K on it when I bought it and repeat pattern as soon as the WG solenoid started acting up @ 140K it got a TM and vac pump came off. I have no idea what had happen maint. wise when owned by others, I think I was 3 or 4th owners, I finally went ATT & reflash when funds became available.
