RE: ECM location
Unless someone moved it, it should be behind the passengers side kick panel. SInce its not there, follow the wiring harness. Look for a big bundle of wires running inside the cab, usually on the passengers side of the firewall. Move the carpet out of the way on the passengers side to locate it. Follow them under the dash.
"Some people spend an entire lifetime wondering if they made a difference.
The Marines don't have that problem."
-President Ronald Reagan
'87 S10-Blazer - SOLD
'93 S10-Blazer 4x4x4 - Sold
'00 S10-Blazer 4x4x4 - 212,000 miles-Sold
'04 Trailblazer 4x4x4- 56,000 miles new DD.