Where is the Throttle Body Sensor located on a 89 blazer 4.3 TBI. Also I need to find where the MAP sensor is can anyone please help me I have already done alot of work to it now it say that for codes. Please help!!!!!

 

I believe your talking the T.P.S which is on the throttle linkage on the side of the TBI. The MAP sensor is co-located with with the EGR Solonoid. The rectangle looking plastic housing on a bracket above the right side (Passenger) valve cover.

 

Thank you. Yea I been taking parts off my 90 Blazer and putting em on my 89 Jimmy and it said those 2 things for the codes.

 

Just for clarification, here's the MAP/EGR solenoid setup Mr. VLS is talking
about - left MAP, Right EGR solenoid in last pic: