Rear crash protection technical details for GMC

Good Acceptable Marginal Poor AHR: active head restraint

Force rating: H=High M=Moderate L=Low

Dynamically tested seat/head restraints: technical details
Make/ model	Model years	Seat type	Geometry			Seat design parameters			Neck forces			Dynamic rating	Overall rating
Make/ model	Model years	Seat type	Rating	Backset (mm)	Distance below top of head (mm)	Pass/ fail	Max T1 acceler- ation (g)	Head contact time (ms)	Force rating	Max neck shear force (N)	Max neck tension (N)	Dynamic rating	Overall rating
GMC Acadia	2013	Power leather seat		8	11	Pass	7.9	54	Low	14	433
GMC Acadia	2008 - 2012 (mfg. after March 2008)	Manual-power cloth seats		36	36	Pass	9.1	71	Low	58	643
GMC Canyon	2004 - 2012	Bench seats		55	45	Fail	10.5	85	Moderate	161	589
GMC Canyon	2004 - 2012	Bucket seats		55	40	Fail	11.8	92	Moderate	212	719
GMC Envoy	2003 - 2009	All seats		78	80	Fail	10.7	96	High	277	879
GMC Sierra 1500	2007 - 2013	Manual cloth seats		62	42	Pass	9.1	87	Moderate	183	528
GMC Terrain	2010 - 2013	Manual - power cloth seats		28	52	Pass	12.8	62	Low	25	467

Seat/head restraints not dynamically tested because of inadequate geometry: technical details
Make/model	Model years	Seat type	Geometry			Dynamic rating	Overall rating
Make/model	Model years	Seat type	Rating	Backset (mm)	Distance below top of head (mm)	Dynamic rating	Overall rating
GMC Safari	2003 - 2005	Seats with adjustable head restraints		100	155	n/a
GMC Safari	2003 - 2005	Seats with fixed head restraints		100	110	n/a
GMC Sierra 1500	2001 - 2006	Seats with adjustable head restraints		60	100	n/a
GMC Sierra 1500	2001 - 2006	Seats with fixed head restraints		70	125	n/a
GMC Sierra 1500	2001 - 2006	Seats with head restraint tilt lock		48	85	n/a