How to fix a vapor lock on chevy 99 Z71 - 1999 Chevrolet Tracker

Best to have the codes read. The only way the T case would affect shifting is if it were locked in 4 wheel low. It would shift fast and not gain much speed. Most times it is the encoder motor on the T case that dies.

Sorry, that was supposed to say vapor lock, auto correct on a cell phone. How do you fix a vapor lock issue?

Not really possible.
Vapor lock was when liquid fuel would vaporize in the steel line or carburetor from excessive heat.
Since your Blazer is fuel injected, the fuel can not vaporize in the line.

98 and 99 intrepid was manufactured with weak fuel pumps causing them to vapor lock try pouring cool water on the fuel rails on the intake to calm vapored gas then try to start it. Even the temp gauge at half way mark is probably still low on coolant causing engine to be warmer than normal causing the vapor lock to fix this problem replace the fuel pump with a 2000 or newer intrepid fuel pump that carries a little higher psi to prevent vapor lock from reoccurring this pump is compatible with your 98 it will plug right in

NEED TO CHECK FUEL PRESSURE TO SEE what it is reading truck should have 60psi if it is lower it can cause symptons injectors wont fire right with low pressure

my 99 z71 transmission lost drive and over drive. what could be the problem?

98 Z71 Chevy rear end will work on this. You may need to get a kit to install disc

I believe that it is 80w90 but you also have to add differential additive for locker that is inside. you can purchase additive at chevy dealership, napa, or other parts stores just make sure it is formulated for gm.

There should be a tag on the rear that tells you the weight. It is probably sythetic oil. If there is no tag, call any Chevy dealer, ask for service dept. and they will tell you.

Your chevy uses two fuses for the system. The power lock actuators are on the 15 amp fuse inside the truck. The fuse for the switches (locks and mirrors) are under the hood. For 99 to 04 (I think those are the years) there is a TSB on replacing the 3 amp fuse under the hood with a 5 amp fuse because this is a well known problem of having these blow.

Your drivers side window is a different issue. If the rest are working your problem is in the motor or getting power to the motor. The wires that go from the body to the door often crack and break with the opening and closing of the door.