20 Most Recent 2002 Chevrolet TrailBlazer - Page 11 Questions & Answers

T stats don't always work. Replace it again. New ones can be bad from the start.

ac expansion valve (TX ) valve is located on the inlet side of the evaporator under the dash it is what controls the rate at which liquid is allowed to escape to turn to gas and so cause the cooling process. they are known to block at the orifice as it is very small or the thermostat will not control the liquid flow to the tx valve

you might try looking to see if the filler tube is cracked and leaking if it is you could replace it and that will take care of the check engine lite depending on what code is being set

COULD IT BE CONDENSATION FROM THE AC?

YOU MAY ACCESS TO IT UNDER THE HOOD.

YOU SHOULD BE ABLE TO ACCESS THEM FROM UNDER THE HOOD.

Internal transmission problem. Clutch band broke. Most transmission problems will give you some sort of warning. But there are parts in it that can break with no warning. Clutch bands are one of them.

The engine is shot. Throwing an oil pump on it , is throwing away money and time. Oil pumps rarely go bad. Pull the oil cap, if the is sludge on it, it is way worse inside the engine. You'll clean it and slap on a pump. Only to find out the crank bearings are worn out and it starts knocking. Change the oil, add oil additive to it and drive it till it dies. Then scrap it or replace the engine.

The external temperature sensor is usually located directly behind the grille and in front of the radiator. It should be relatively easy to find because it will be the only thing in that area with wires.

Are your asking about TXV valve thermal expansion valve for A/C system ? If you are ,yours doesn't have one . Has an orifice tube , The orifice tube is located in the liquid line between the condenser and the evaporator ! The orifice tube is the dividing point for the high and the low pressure sides of the A/C system. As the refrigerant passes through the orifice tube, the pressure on the refrigerant is lowered. Due to the pressure differential on the liquid refrigerant, the refrigerant will begin to vaporize at the orifice tube. The orifice tube also meters the amount of liquid refrigerant that can flow into the evaporator. Unless you are referring to the auxiliary A/C system for the back of the vehicle , it uses a The rear TXV is located at the rear evaporator inlet. The TXV is the dividing point for the high and the low pressure sides of the rear A/C system. As the refrigerant passes through the TXV, the pressure on the refrigerant is lowered. Due to the pressure differential on the liquid refrigerant, the refrigerant will begin to boil at the expansion device. The TXV also meters the amount of liquid refrigerant that can flow into the evaporator.

You need an interface module so it will work with the vehicle ! The radio is hooked up to the class 2 serial data bus , if you don't hook it up right the vehicle will not start an run !

run the fault codes and look for faulty TCM module or servo/ solenoid faults for those gears

Yes

You need to line up the dots on the crank and can gear in the center of the engine . They call them timeing marks have you ever done this before ???

The motorolla box may be remnants of an old disk changer for the stereo. With an amp your power wire goes into the positive wire that goes to your battery, your ground wire will be connected to some bare metal close to wherever you decide to install the amp, and the blue remote wire will be connected to the remote wire that in on the wiring harness of your aftermarket radio ( I'm sure your not installing an amp with your stock radio). Good luck I hope this helps

my suggestion is that you check/ replacr the HDM(headlight driver module) relay in the main fuse box located under the hood near the battery.

Iwould be careful what I replaced this seams to be a big problem with these vechicles at least a dozon codes all related and thats not counting the 02 sensor codes 20 more all realated

Possibly the crank sensor it tells the injectors and coils when to fire. Relieve fuel pressure then re pressurize the system if it gets pressure the fuel pump is good at least

The previous owner used to be a real driver and the Blazer missis him.

This is a tricky code PO252 refers to the fuel injection pump metering control A range performance. Their just isn't enough information for me to ever speculate other then its a 2002 try changeing the fuel filters and take a look at the pump out put pressure it should be over 60 PSI at least if its lower it could be the fuel pump