2000 GMC Savana 1500 Questions

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I replaced fuel pump fuel injectors distributor & major tune up& map sensor i noticed air intake hose was missing u can hear the vacuum sound i replace the hose in my van it ran for a cpl hrs & wouldnt start back up i...
:key on=48psi then slowly drops to 43psi (takes 10 seconds). Engine on=54psi/idle, rev it up & drops to 48psi, let off & back to 54. Will crank, won't turn over without starting fluid. 130k miles, daily work vehicle. ...
Front air is working. Back air is not working. Possible valve repair/replace?
heater blows hot air but gauge measures lower than normal when engine is hot
The driver's outside door handle started to pull away from the door. I bought a new one, but I can't figure out how to get the old one out and the new one in.
How do I remove the current Lock Cylinder and replace it with a new one. I can put key into key the lock cylinder and it will turn to the on positon that also unlocks the steering wheel but that's all it does. It goe...
my reaar shock brke thro the frame mount
Speedometer Jumpy...Check engine light on...tranny slips and misses at heavy acceleration... Could these symptoms occur from a bad/faulty/dirty speed sensor on transmission
What would the average cost to replace window motor for drivers side window?
My van is sitting at about 144,000 and I have found a mechanic who is really good, high integrity etc. Also seems to be reasonable in charges. So I just want to know what to get addressed and thoughts on cost.....the ...