20 Most Recent 2002 Chevrolet TrailBlazer - Page 5 Questions & Answers

it sounds to me like the security system is failing i had it happen to one of my GM vehicles.. i took it in and they wanted a ton of money to fix it so i did lots of research. I found a part you can install yourself and it will bypass the system and allow the car to start every time, i put mine in 5 years ago and i havent had a problem since. check out the site i checked and the list your car in on it year make and model for the problem.. They have great customer service and if for some reason it doesnt work they will refund you 100% Hope this gives ya some help http://vatspasslockpasskeysecurityhelp.com/ Do It Yourself GM Security bypass

Dry is 11.2 quarts of Dexon 6. 5 quarts if you're just doing a filter replacement.

for a full list and pics of the ignition for your vehicle, go here:
"http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c152800a110d"

The first thing to do is check for fuel pressure, the fuel pressure test port is on the top of the engine in the pipe that supplies fuel and sits over the fuel injectors, it looks kind of like a tire fill valve. A quick way to see if fuel is the problem is to buy a can of spray starting fluid, spray it into the engine air intake hose while the engine is cranked over, if it starts then shuts off you have a failed fuel pump or fuel pump circuit problem. Below you will find a link to the wiring diagrams to check the fuel pump wiring circuits. If fuel is ok then run a fault code test on the engine control module. You will need an OBD2 system code reader, you can borrow one from most chain auto parts stores. Read the fault code and then Google them for help with there meanings. http://bbbind.com/free_tsb.html

First have the engine control module (PCM) scanned for fault codes, next if that yields no results have the fuel pressure checked under a load while driving and duplicating the power loss, you may have a failing fuel pump. The least likely possibility is that the exhaust system is somehow restricted, in that case you would need a shop to do what is called a exhaust backpressure test.

Exhaust manifold leak? That's not common. You talking about the VVT near the manifold at the top of engine above the power steering pump? Yes indeed, AC Delco is the only one our engines love. 41-103. Obviously you have P0304, what other codes?

I don't know what testing you have done? A lot of things can cause a misfire, fuel--spark--compression. My info shows coil on plug ignition, did you visually check for spark at the number 6 plug? Did you check fuel injector pulse?

reduced engine power has to do with the electronic throttle control or drive by wire . All electronic wires under the dash on the gas pedal , electric motor on the throttle body . DTC'S - diagnostic trouble codes stored in the computer . Take it to the dealer .

There are something's involved that you are not aware of , or familiar with . Electronic control modules . Rear Wiper/Washer System Controls • Body control module (BCM) • Liftgate control module (LGM) • Rear wiper/washer switch Do you know what a serial data network is ? Rear Wiper/Washer System Operation The rear window wiper/washer switch is an input to the BCM. The requested rear wiper mode is sent to the liftgate control module (LGM) by the BCM as a message on the serial data circuit, and the rear window wiper motor is controlled by the LGM. The switch power circuit to the rear wiper/washer switch is a 12-volt reference supplied by the BCM during ignition on, accessory or RAP power modes. The rear wiper/washer switch is a series of resistors and the switch position is determined by the voltage of the rear wiper/washer switch signal circuit to the BCM. The rear wiper/washer switch has continuity at all times and the BCM expects a rear wiper/washer switch signal voltage in all switch positions including OFF. The rear wiper motor is supplied battery positive voltage and ground. The LGM controls rear wiper motor operation through the rear wiper motor control circuit. The rear wiper motor control circuit is supplied a battery positive reference voltage by the rear wiper motor module and is pulse width modulated to ground by the LGM. The duty cycle of the pulse width modulation determines the rear wiper motor operating mode. The liftglass and liftgate ajar switches are inputs to the LGM and must be in an inactive state in order for rear wiper washer system operation to be enabled. When an ajar switch is active the LGM suspends wiper motor operation directly and sends the ajar switch status messages over the serial data circuit enabling the BCM to suspend washer pump operation. The rear window washer pump is controlled by the BCM through the rear washer relay. Battery positive voltage is supplied to the coil and switch sides of the rear washer relay. When the rear window wash request is active the BCM energizes the relay by grounding the relay coil through the rear washer relay control circuit. When the relay is energized battery positive voltage to the relay switch is supplied to the washer pump control circuit. Your best bet , take it to a qualified repair shop and have it checked for DTC'S - diagnostic trouble codes . DTC B1017 or B3970 The rear wiper motor is supplied battery positive voltage and ground. The liftgate control module controls rear wiper motor operation through the rear wiper motor control circuit. The rear wiper motor control circuit is supplied a battery positive reference voltage by the rear wiper motor module and is pulse width modulated to ground by the liftgate control module. The duty cycle of the pulse width modulation determines the rear wiper motor operating mode. DTC B3799 2 Turn the ignition ON. Operate the rear wiper switch through all the switch positions. Does the rear window wiper operate normally? -- YES - Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems NO - Go to Step 3 3 Install a scan tool. Display the liftgate control module data list. Observe the following parameters while operating the respective switches. Refer to Scan Tool Data List for typical values. • Liftgate Ajar Switch • Liftglass Ajar Switch Did the scan tool indicate the correct switch positions? -- Go to Step 4 Go to Courtesy Lamps Inoperative in Lighting Systems 4 Observe the requested rear wiper parameter in LGM data list. Operate the rear wiper switch through all the switch positions. Does the scan tool indicate the correct requested rear wiper parameter in relation to the switch position? -- Go to Step 5 Go to Step 6

Check your bushing on the shift linkage. These tend to break, very common. Dorman offers a repair bushing.

Simple, but difficult to do it perfectly. Rather go to a glass shop. 5minutes and you're on your way.

you might check your switch sounds like to me that your two lower speed sides of the switch maybe burnwed out.

Check gages means that one of the gages is reading an abnormal reading, like hot engine oil pressure issues, charging system voltage, pay attention next time it happens to the readings on the gages for something out of the normal

You can't disconnect the chime, it goes thru the radio and is generated by the Body Control Module (BCM).