Why does my '93 chevy suburban over heat while idle

oil pressure to lifters is low yet and some valves may not be fully opening..others may be sticking a bit.... emissions controls sucking in cold air because heat control valves are stuck..

You buy no parts or ever install a thing, until you
understand the system your working on & properly
test it

Has to fail a test to require parts

e.g. Have to find the problems

there are 2 fuses only for the abs on the trk. 60 amp #2 maxi fuse and fuse #3 10 amp fuse for the ebcm. there isnt any relays for the abs.

i have a 1995 chevy 5.7 350 out of a suburban in a 86 chevy pick up an its over heating i done replaced water pump,thermostate,radiator,all new fluids an replaced clucth fan to striaght fan an its still over heating an no bubbl;es in radiator either can sum one please help me fig this out please

try to see if ur heater core is pluged up sumtimes that can cause ur car to over heat. hope this helps

Usually this problem is solved by opening the driver's door & looking for a broken wire. This wire usually breaks at the flex point of the harness between the door & frame. Carefully slice outer coating revealing hidden wires. The broken one is the culprit. Hope this helps. Good luck!

catalytic converter plugged restricting exhaust smells like rotten eggs/sulfur replace

Automatic I presume. 8 degrees BTDC @ warm & 700 RPM.
distributor vacuum off & plugged. In drive, & accessories off.
Don't forget parking brake on.

Heater core possibly plugged,,or fan unit not working.