Question about 1994 Chevrolet S-10 Blazer

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I need a wiring diagram for a 1994 chevrolet s-10 blazer tahoe with a 4.3L v6 vortec engine.

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I need to know which wiring diagram you need, powertrain, exterior lighting, engine management?

Posted on Oct 04, 2009

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Need vacuum line diagrams for a 1994 Chevy s10 blazer, Tahoe. 4.3L vortec v6. 4x4. As soon as problem please if anyone can help.


Look for the emissions label inside the engine compartment, they usually have the emission routing schematic for your car there. Failing that your local library has access to online service manuals, you can get the info there, free.

Aug 29, 2014 | 1994 Chevrolet S-10

1 Answer

Exact fuel pressure for my vortec v6


The CPI injected engine should be 55psi when running.

Dec 21, 2010 | 1994 Chevrolet S-10 Blazer

1 Answer

94 4DR CHEVY TRUCK BLAZER S-10 4.3L V6 ENGINE NEED TO KNOW THE RIGHT MODEL/NAME OF GAS PUMP MY TRUCK USES PLEASE ! ? !


when ordering fuel pump, need to know the vin letter w or z. one is for a carb and the other is for a injection or vortec engine. one puts out 11psi and the other puts out 60psi. is this an in tank fuel pump?

Nov 12, 2010 | 1994 Chevrolet S-10 Blazer

1 Answer

'94 S 10 Blazer V6 Vortec EFI. Fuel pressure good, new fuel injectors installed, fuel pump works ok. Only starts with starter fluid sprayed into air intake. Any Suggestions?


your statement is fuel pump work ok, have you tested for proper fuel pressure. just because the fuel pump works it could have less pressure needed to start the engine. maybe the fuel filter is plugged. start out by replacing the fuel filter, if this doesn't fix it, you need to pressure test the pump. even 10 psi reduction in pressure will allow the engine not to start.

Nov 03, 2009 | 1994 Chevrolet S-10 Blazer

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1994 s-10 blazer 4.3 vortec wiring harness


The color codes will be different so when you take the harness off the 95 make sure that you label ALL the connectors to make it easier to install it on your Blazer. You may also have to change some sensors or switches up to 95 so that the harness will fit. Label all the empty connectors with their location in the 95 because they will be for options that may or may not be on your Blazer. If you have to access a wire diagram to complete the job then use the 95. DON'T let someone else take the 95 harness out for you andtake a rough diagram of your truck with the plug-ins marked for location and # of pins for wires. Basically it should fit but attention to detail is a must.
Also check out faxonautoliterature. They list GM service manuals but also GM books for engine interchanges that may prove to be very helpful. Hope this helps.

Nov 02, 2009 | Chevrolet Blazer Cars & Trucks

1 Answer

I had a 1996 vortec v6 put into my 1994 vortec and it has not run good since can you help


The prom chip needs to match the motor...if you didn't change the chip in the computer, you need to do that.

Oct 20, 2009 | 1994 Chevrolet S-10 Blazer

1 Answer

94 blazer vortec 4.3 idle revs up and dont come down


check your Throttle Positioning sensor that should fix your rough idle the TPS controls the breather on the front of the engine its affixed to the right hand side of the throttle body just infront of the spyder on the V6 Vortec 4.3L Models

Nov 09, 2008 | 1994 Chevrolet S-10 Blazer

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