Set timing on 2002 chevy blazer 4.3 v6 vortec

SOURCE: 2002 chevy blazer fuel pump (4 door)

yes you have to drop the tank. you will also need a fuel line tool to unhook the fuel lines. before you drop the tank see if tou can reach and wiggle the electrical connection on the top of the tank. these pumps have a pigtail issue. please rate

SOURCE: firing order for 4.3 liter chevy blazer

1-6-5-4-3-2

SOURCE: need diagram

If you plan on doing alot of of your own work on your car, its best to go to the parts store and purchase a manual. The manual will have a full diagram of the engine. It will have everything that is to know about your vehicle in it. If they dont have one in stock they can probably get in the next day.

SOURCE: how to remove rear door panel on 2002 chevy blazer

usually two screws one at the armrest and one under the power window console , this console usually pops out to let you at the screw.

SOURCE: 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.