I am helping a relative work on his 2003 Blazer. I was wondering if anyone has any helpful hints or advice?

4.3L V6
4L60E trans with deep pan
non-limited slip diff


So far I have:

oi change
coolant exchange
rear hatch lift support replacements
thermostat replacement
brake fluid exchange all 4 wheels

planning:

Power steering fluid exchange, drain and fills x3-4 (prestone)
Transmission fluid exchange(s) with new filter + lubegard (castrol transmax D-VI )
Rear Differential fluid exchange with new gasket (valvoline 80w-90)
another coolant flush/clean and exchange (prestone)
sea foam air intake cleaning/hot soak
spark plugs ngk

 

Have you considered the basic tune-up stuff, or is that already done?

 

Yes I should add spark plugs to the list

 

I see on the planning list , you show NGK spark plugs. Many on this list recommend only AC Delco= either the single Platinum or double Platinum. There is also an Iridium version. Just trying to keep you from having problems and having to do the plugs again. No. 3 is the difficult one to get to. Rock Auto has them. So does the auto parts stores like AAP. The distributor rotor and cap are other essential parts of the tune up.

 

Check serpentine belt, it easy to replace . If there's play in the steering, check rag joint for deterioration . I'd also check rear shackles for rust through.

 

Ha ha ha, replace the rear differential gear oil???

Put a decent radio in there. You can drill out the piece of pop-out plastic for a microphone and a magnetic phone holder.
Fix the rattles and squeakings, including the B-pillar. Grease the rear door latch.
Replace the spare tire with a subwoofer, a big one!
Replace those dim headlights. Dump the third brake light. Get a cooler looking grill, from ebay. And some door window shades. Maybe install a roof rack with some lights... and how about some underneath the car, too..
Cover the hood with a carbon fiber vinyl wrap, and the roof, too. Do something nice to the wheels, please!





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I just wanted to post that all this work is done. Also a new catalytic converted was paid for to have welded in. Along with new O2 sensors. Also it was showing the P0128 coolant temperature threshold code. I fixed that with a new coolant temperature sensor (on the engine driver side ). I also measured the ohms of the old and new coolant temp sensor and saw that they both decreased in ohms as i heated them up, but the old sensor was systematically lower by about 300 ohms (which would tell the engine the coolant is hotter (?) ). Anyway it fixed the code.

The diff gear oil looked fine, yes I guess I did not need to do that!

If the trans pan had a drain plug I would do another DF.

The spark plug wires seem fine for now. The dist cap and rotor I don't know when they were replaced last.

Also the belt and tensioner assembly and idler pulley were replaced, and a new ACDelco Pro alternator.