Transaxle, 5 speed manual, Getrag

Years 1991–93 Models 1 Factory citations 1

Also documented for Chevrolet Oldsmobile

Documented applications

Grand Prix — W-body (1988–1996)

1991–1993 Single-source

the Getrag HM-284 with the LQ1; the W-Body Page's transaxle table gives M27 for 1991–1992 (an enthusiast page that the tier map never verified); Wikipedia's 60° V6 article gives the Getrag 284 five-speed as optional with the LQ1 in 1991–1993 without a code, and its Grand Prix article names 1993 the last year for a manual; 1993 from the Lumina kit; shared W-body code; cited from the Chevrolet Lumina kit (1993)

GM Heritage factory kit — 1993 Chevrolet Lumina, p.73.

This page aggregates every documented appearance of M27 in the Pontiac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.