20 Most Recent 2000 GMC New Sierra 1500 - Page 8 Questions & Answers

Is your "Check Engine" or "Service Engine" light on? Scan your onboard computer system for possible fault codes even if your engine light is not on. There are some fault codes that can set without turning the light on.If there are no fault codes, there is not much you can do other than performing normal maintenance like replacing the air filter and fuel filter.

yep bad ground in the dash

You don't have a clutch in that automatic, check your transmission fluid first. Make sure you run your truck for 10 min. or so before you check the fluid level. If your fluid is correct then take it to a mechanic, they can check your transmission with their computer and see exactly what is happening when it can't find 4th gear.

You have a bad blower motor resistor that is bad.It is located on the passengers side under the dash.Just turn the blower on the speed that it works and follow the blower motor noise when it is on.The resistor is what controls the speeds.You will probably find that the wires on the connector are melted.You will have to replace the connector and the resistor.I have done a few of these repairs.You will need to remove a plastic panel from under the dash first.3or 4, 7mm screws.You might get a letter in the mail from G.M.You can also cal the dealership and find out if your vehicle is involved in this letter.Hope this helps.Good luck.

There may be also a flow sensor in line with that valve, also check for split rubber hoses. On mine, a dose of intake cleaner in the valve and sensor and a replaced split hose turned off the light. Larry

None, check your light bulb socket and voltage if you have a 12v probe.Turn your 4 ways on and see what's flashing.Probes are cheap and a great thing to have.Probe the socket and see if you have power.You don't say if it's the front or rear, that would help.Also it could be your turn signal switch or light sockets.

After replacing the thermostat I pulled the heater hoses off and blew air through the heater core at firewall. Can only blow in left side as directional valves will prevent opposite. Chunks of stuff came out with coolant. I then put a piece of hose on the left side and shot water through until it came out clear.
Put it all back together and heat works fine.

check for codes in the pcm then check the fuel pressure you may have a bad pump also the fuel filter may be plugged

check the fuel flter as it may have sucked up alot of dirt from the bottom of the tank and plugged up.the other possible problem is the fuel pump may be bad and need replacing.

This may help you with the security light http://vatspasslockpasskeysecurityhelp.yolasite.com/

The PCM has detected a fault in one of my of the systems that it controls. It turns the light on to let you know this. Codes should be stored in the PCM's memory. Most auto parts stores will hook up a code reader for free and let you know what codes are present.

Yes...this has a suppot on the front of the starter with a 7/16 nut

It's located on the R/H frame rail.