check the spark plugs and the rotor arm and the cap change if worn and put fuel cleaner in the fuel tank as a carbon build up in the valves and to clean the injectors .
With no speeds at all, check the fuse, then check the blower speed switch and it's electrical plug.
All 5.7L engines have the same firing order. 1-8-4-3-6-5-7-2
either the fan switch is faulty, or the fan itself is faulty. most likely to be the switch
Yes. the computer runs the cruise.
no I tried and the speed sensors and circuitry are not compatable different control units
Based on all of the information given in the question, it appears that a defect exists, perhapsan intermittent one, either in the radio, or in the antenna, power, or speaker wiring to it.
If your 99 Chevy Suburban runs smooth, but going up hills it loses almost all of its power and only goes 40 to 50 miles per hour, check the distributor. The cap might be broken or cracked.
Why do headlight stay on all the time on 2001 suburban
meow i am a kitty i mean moo im a meow
Sounds like a bad blower motor resistor block.
Check for 12V at the blower motor connection with ignition on and while selecting all blower speeds with fan switch. If you have power with all speeds at that connection you probably have a bad blower motor. If you don't have power there with any speed selected you probably have a faulty fan switch. If you have power there with only some of the speed selections you probably have a bad speed resister. If you power there at all speeds but high you probably have a bad high speed relay.
Most all suburban that year are 4x4