Air bag needs reset in 1998 chevy blazer ls. air bag comes on and goes off while driving down the road.

Winter doesn't matter, because tires are always measured cold.

1999 Chevrolet Blazer Tire Pressure

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1999 Chevrolet Blazer LS 4x2 · 35 psi · 35 psi · 32 psi · (32 psi). Front Tire, Rear Tire. People also ask

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Question edited for clarity and typos.
Question moved to model category.

Why do you think you need to change it?

https://www.google.com/search?q=1998+chevy+blazer+ls.+transmission+control+module+replacement

Location

https://www.google.com/search?q=1998+chevy+blazer+LS+TCM+location

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You have to figure out which differential you have. There are two versions based on the size of the ring gear and an optional third version for a wide track off road model.
The ring gear sizes are 8.5 inch and 7 5/8 inch. The wide track option is ZR2.
The 8.5 inch gear uses a cover plate that is 10 bolts and round, the 7 5/8 gear uses a plate that is also 10 bolts but more square. You should be able to look the gasket up online or check with your auto parts store to match it up to your plate. If neither gasket looks like your plate, you may have the wide track option. The option sticker is usually in the glove box.
The 28 inch axle is normally used with the smaller ring gear, and the 30 inch is used on the 8.5.

Try doing the following.

Engine stalling issue at low speeds

This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve. Buy a can of throttle valve cleaner from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control

broken switch. unplug it if it stops that is your problem. if it is on the steering just find the plug under the kick panel , DO NOT UNPLUG THE YELLOW CONNECTOR that is your air bag system.

I'm actually going through the same thing, after i just had my fuel pump replaced. Mine turned out to be my Mass Air Flow sensor (MAF) which when not working properly has the same effects as your acceleration not working.

check the fuses and wiring in the fuse box and the relay ,either that or the abs pump has a problem.

Try changing the distributor cap, rotor, plugs and wires

check valve for pump is bad leaking back thru,that is if both bags are deflating

OBDII scanners for the home DIY guy only scan powertrain codes ... and not body codes .... which is where the airbag code(s) would go. Scanners that do both are expensive. I would call a local auto parts place that advertises that they will scan for free ... but ask them if their scanner can read body codes related to the air bag. If they say yes ... I would take it to them and to narrow down your troubleshooting ... since the airbag light can go on for a bunch of reasons and you do not want to just throw parts at it.
Helpful?
Good luck with your troubleshooting!