I have a2001 chevy blazer and the tag lights dont have power to them.Ihave check the fues and are good

Bell housing bolt pattern is the same between the 2 and will bolt up. Same goes with the small block 350. Same bolt pattern. Your only situation would be in driveshaft length and 4 wheel drive. Measure up the trans from bell housing to back of trans for tranny length. If same, go for it.

check fuse did you test power to harness with tag light on does all other lights work did you replace bulb

THE BULB

I had the same exact thing happen to me, I have a 97 blazer and after hours of screwing around with it and several different options... it turned out to simply be the ignition switch.

FUSE PANEL IS ON DRIVER SIDE UPPER LEFT OF THE BRAKE PEDAL VERY HARD TO GET AT,YOU NEED A FUES PULLER TO REMOVE FUES. DUMB PLACE FOR FUES BOX!!!! I HAD A 93 BLAZER,,GOOD TRUCK LASTED OVER 500,000 KM.

no there is no dedicated fuse for tag lights.check bulbs,and check for power on tag light wires, and check for ground also.

Disconnect the connector for the fue injector on the left side front of the intake plenemn there are two wires on red one blue these are your fue injector wires, check for power on one wire with the key ON One has power with the key ON, and then take the test light connect one end on one of the wires coming out of the harness NOT the plenem and the other end of the testlight to the other wire in the same connector don't let them touch togother! sue a paperclip or cotterpin to let you connect the clip of the testlight to the connector.crank and you should see the light blink( I just want to narrow down the possibilities) If you see the light blink Good. Then make sure the PINK wire wire going going in the module has 12V KEY ON and also check the two wires inside the distributor that come from the pick-up unit make sure they are not broke the distributor pick-up unit failes commonly, its easier and less expensive to just get a used distributor that works and be done with it.

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www.aceautomotive1.com here you will find and entry in the BLOG or FAQ that is just like your problem and how I fixed it.

Check your connections. did you run the fuel pump wiring under the drivers side door sash like GM did?.. if so check for nicks in the wire or bending or cracks.. this happens.. happened to me. check your fuel pressure. 40 dollar part at an auto store. If its below 59 PSI it wont work. And blazers are very intolerable to low fuel pressure. Also try taking the negative post off your battery for a little while and then putting it back on and if you can get it started again drive around (if its safe and running decent) for at least 30 minutes to get your car computer system acclimated to a new functioning part. Did you check the fuel filter?. rule of thumb when a pump goes change the filter its always the last thing people expect because we all jump to catastrophic engine failure at the first no start moment. lol.
Make sure that all your ducks are in get my drift.. Air oxygen fuel thats the mixture you need to check all those vital parts. before pulling your head off.

When my blazer did this they had to replace part of the wiring harness in the steering wheel. It took forever for them to get the parts because we live in nowhereville, but once it was in it works again and no problems. I had to take it to the actual chevy dealer because none of the other places had a clue. good luck.

i own a 1991 chevy blazer myself but my problem is opposet of yours my back lights stay on well i went underneath the dash board an i look up underneath my steering column an i saw to components one was to my cruise control an the one in back of it was to my back lights an i moved this around an to my surprise my light swork good now but now my speed odometer doesnt not work an my gas gauge am my oil aa water gauge my power windows dont work an niether my a/c or heater defroster im jus wondering if i need to move this component alittke more to the left or right yesterday everything worked hmmmm