Perhaps the question asker is referring to the ignition coil module that feeds to the distributor. This coil is mounted to the passenger side of the intake manifold with (2) 10 mm hex screws. Replacing this is a simple matter of unplugging the electrical connections, unbolting from the manifold and installing a new coil in the reverse procedure. Please note that the '99 suburbans still used the 5.7 liter, L31 RPO engine and are different from the pickup truck line which had already switched over to the new 6.0 engine line.
The engine computer is the ignition module.
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What engine? Ford contour 2.0L DOHC eng. distributorless ignition are controlled by the main PCM There is an ignition module on the 99 contour 2.0 with automatic transmission. It is shown in the schematics for this model.
The 1999 Chevy S 10 pickup truck ignition module can be found on the firewall in the engine compartment. The ignition module will be on the drivers side of the firewall.
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Right under the ignition cap.
There is none!
Inside the distributor
No, not if it is not defective. If the ignition switch is defective then that is all you need to replace.
It is part of the engine computer.
The Ignition control module is mounted under the hood. It is on the fire wall right beside the hood strut,
Unscrew a few screws and pull it out