20 Most Recent 2002 Chevrolet TrailBlazer - Page 3 Questions & Answers


This has variable valve timing. The VVT is run by oil pressure. A code can be the wrong viscosity oil, oil sludge or a bad VVT mechanism. The only way I'd even think about this vehicle is after it's been inspected by a mechanic. Skip that you you buy this vehicle at your own risk.

2002 Chevrolet... | Answered on Aug 27, 2017


bad ignition switch. First thing to check.

2002 Chevrolet... | Answered on Aug 03, 2017


Well the radio must come out and sent out for repair, nothing you can do to fix this. As far as the other problem goes I suggest you clean the throttle valve and the idle speed control air bypass valve with throttle valve cleaner.

2002 Chevrolet... | Answered on Jul 27, 2017


First step is to see what error codes (DTCs) are present using a code reader.

2002 Chevrolet... | Answered on Jul 14, 2017


1415 secondary air injection system bank 1
1345 crankshaft position-camshaft position correlation
You have something wrong with either your camshaft or crankshaft sensors. That's why car won't run

2002 Chevrolet... | Answered on Jul 06, 2017


How old is your car? When did you have it serviced last?

2002 Chevrolet... | Answered on Jul 05, 2017


Hi, the function of keeping the idle is performed by the idle air control valve. The valve may be stuck or the air passage clogged. This is not related to replacing the battery. Use a voltmeter to probe the back of the connector. Then start the engine and watch the meter as you turn on the a/c. You should see a blip in voltage as the computer tries to open the valve. If no blip, suspect you have a wiring issue. If there is a blip, remove the valve and check the air passages for blockage. If you see blockage, clean with carb cleaner. If no blockage, install a new valve.

2002 Chevrolet... | Answered on Jun 27, 2017


Does your rear AC work? If not, chances are what you're seeing is AC oil from a leak in either the tubing or the evaporator core.

2002 Chevrolet... | Answered on Jun 26, 2017


You are correct. Send a start 12volt to the S connector and if you have a ballast resistor the coil end goes to R.

2002 Chevrolet... | Answered on Jun 12, 2017


The transmission fluid filter is the problem. This service should have been done at 80,000 miles. A dirty filter will cause the charge pump whine and loss of charge pump pressure will cause clutch packs to slip. Do not perform this service yourself, Its messy and not for novices. Do not drive or damage to clutch pack friction plates will occur.

2002 Chevrolet... | Answered on Jun 05, 2017


You started at the wrong end. The speed sensor controls the function of those solenoids you just replaced. Did you change the transmission Fluid and filter, it was due at 80,000 miles. Perform an OBDII scan of the stored fault history. let the OBDII scan be your guide to repairs, to avoid buying parts you don't need. Loss of speed sensor signal will result in no torque converter lock up or overdrive as well as no down shift back to 1st.

2002 Chevrolet... | Answered on Jun 04, 2017


Sounds like the accessory circuit in you ignition switch is going bad. The switch is located down on your steering column and is available at most auto parts stores. Just do a lookup for a video on doing the work.
Reason I say ignition switch is that the problem occurs with bumps. The keys will move slightly, moving the arm that moves the switch. Using less weight on the keys also helps avoid this. Just try the truck with the key off the ring

2002 Chevrolet... | Answered on May 21, 2017


No need to replace the compressor. That will solve nothing. The electrical wire connection to the compressor clutch can be replaced.

2002 Chevrolet... | Answered on May 04, 2017


More then likely the brushes are sticking in the blower motor.

2002 Chevrolet... | Answered on Apr 19, 2017


Ivan, Trailblazer only came with the 6 or 8 cylinders. You probably have the I6 engine. I have found that removing the battery AND battery tray makes this job really easy. Must remove alternator and alternator bracket. Pretty forward from there, make sure you replace your temperature sensor also while you're in there, it's right above the thermostat.

2002 Chevrolet... | Answered on Apr 19, 2017

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