The GM 8L45 and 8L90 converter feed limit valve has an inboard valve spool fed by a hole through the valve into a blind port in the casting. This design makes vacuum testing the inboard spool and casting by traditional methods impossible. The Sonnax converter feed limit valve vacuum test tool 154740-TL22 enables quick and easy vacuum testing of the inboard testing location. This tool can also be used to test the outboard location.

• Allows quick and easy testing of the inboard vacuum testing location
• Mimics the OE valve design to enable outboard location vacuum testing