2000 chevy silverado z71 installed new motor-wont start

Because revving the motor makes the oil pump spin faster and therefore increases pressure. It should be stable and within specs when you are at cruising speed.

you need to replace the fan resistor located by fan motor if not there then trace red and black power wires to locate resistor behind or under dash it wont be mounted far from fan motor

Check the oil filter housing and the cooler lines at the housing. The oil filter housing gaskets are good for no more than 15k to 30k miles if your lucky. The lines at the housing are easy to strip out when you reinstall them so take your time if you do it yourself an once you are finished and ready to start the truck, let it run for about 15 minutes and constantly check the area for leaks prior to road testing the vehicle.

I would agree with you on the ignition switch. When it doesn't want to start, check the small wire on the solenoid to see if you are getting power from the ignition switch when it's turned to the start position. If not, I'd say it's the ignition switch. If not, could be a bad solenoid.

how do i remove back brake shoes on a 2005 chevy z71

try selecting from nutreul or less then 3km

You probably blew a fuse and the other affected components are on the same fuse. Check the fuse blocks for any blown fuses and replace as necessary.

THEY SHOULD BE UNDER THE DASH

There is a light sensor that tells the truck if it is night or day on the dash. Make sure that is it not covered up. If is is not then you may have a bad sensor. It sounds like the sensor is telling the truck that it is night every time the truck is running.

Start the tuck with the park brake on to see if the light come on when it starts. If they do you have a bad relay if not it is most likely that sensor on the dash.

I also had the same problem on my 2000 Silverado 1500 Z71....on both doors!!! I found the best solution (even though I didn't have the money) was to get it fixed by a good mechanic who wouldn't screw up anything else in the process. Passenger side went first...then a year later, drivers side fell half way down. He researched the solution on his own...found out you have to buy the whole window motor assembly. After labor....300 bucks each window...OUCH!!! Bought my truck new in 2000. Window problem happened in 2006 then in 2007.