Question about Chevrolet Silverado 1500
Posted by Anonymous on
I am having the same thing. I talked to a guy tonight said take the fuse block under the hood, and flip it. Look at the right side section, bottom left corner a thin red wire was burnt up inside the connectors. His friend works for the dealership told him where to look. Said so many of thesetrucks have this issue but Chevrolet wont do the recall. He also said check them all just in case. It wont cost you anything but a little bit of time. I'mchecking mine tomorrow. I had my transfer case rebuilt, new pushbuttons, new tccm, new transfer case motor, and still nothing. My next step was a auto electrical shop. I truly hope this helps because I know your pain. And stress.....oh the stress
Posted on May 26, 2016
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Posted on Jan 02, 2017
SOURCE: purge solenoid location
which vehicle are you actually looking for the purge solenoid on? you have 2 vehicles listed in your question. i'll answer both, lol
the locations are described as if you are looking at the engine from the front of the car with hood open.
on the blazer:
it is located on the left side of the intake manifold just under and behind the throttlebody. it is a canister looking device.
on the silverado:
it is located on the intake manifold on the left side in about the same spot as the blazer. providing the silverado has the 5.3 or 5.7 liter engine. if it also has the 4.3 then obviously it will be the same.
hope this helps!
Posted on Feb 17, 2009
The Best diagram you can get is at alldatadiy.com it has the sections and locations and color of wires with pictures.
Posted on Aug 20, 2009
Having the same exact problem but with my 1999 escalade. Thought it was the actuator bought a new one installed it transfer case would engage but front end wouldnt lock. Took it out of housing left it plugged in got a friend to go through all the 4wd for me and the plunger never moved out the actuator. Checked my wiring harness which is a four prong ann it had one hot prong like it is suppose to. Traced wires even replaced dash switch same problem. Taking it to local dealership tom to have it checked for codes. I was told it could be the transfercase actuator even though its workin that actuator is what sends power to the front to engage the actuator to lock the differential.
Posted on Sep 16, 2009
On the full size, the front actuator is electric, not vacuum.
When in 4wd mode, a switch on top of the transfer case conducts 12 volts out to the actuator. Wire #50 (brown) is the 12v feed, and it conducts to the light blue wire (#900) to the actuator.
When shifted out of 4wd, the switch opens up and no voltage goes to the actuator.
Check voltage at the connector for the front actuator (at the front differential - it looks like a large bullet that threads into the front diff.) If it has 12 volts, the actuator is the problem. If it does not have 12 volts, check the transfer case switch and the power feed to the transfer case.
I'll assume it is the actuator, if the plug to the actuator is getting 12 volts when in 4wd.
The way this actuator works, is it is a sealed chamber that gets heated by voltage. When it heats, the pin in the end swells and pushes a shift fork in the front differential. The shift fork engages a spline on the passenger side of the differential, and boom! you have 4WD.
GM offered an upgrade to this actuator that is a motor instead of a heated device. However, it requires a small harness addition, a spacer, and a new actuator. It is about a $150 to $200 option.
If I were you, I would buy a new heated actuator. They are available at most auto parts stores, and are about $90. They are also on eBay for about $55 plus shipping. These are very easy to change - just thread out the old one, and thread in a new one.
Good luck. The actuator is usually the problem 90% of time but recheck all of the wire harness just to maker sure there is no short before replacing any parts.
Posted on Jan 07, 2010
SOURCE: What do we do when
P0446 could be a bad purge valve, bad ecm, or wiring between. the only way to know is to have a mechanic diagnose it. It needs to be repaired if you want the engine light off. If you let it go, the ecm cannot tell you if other problems are happening because the light is already/still on.
Posted on Sep 10, 2010
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