2006 GMC Sierra 1500

large pickup / Crew cab pickup

Rating overview
Evaluation criteria	Rating
Head restraints & seats

Key

Some ratings use a scale of Poor to Good. Others range from Basic to Superior.

Seat type: Seats with head restraint tilt lock

Overall evaluation
Dynamic rating
Seat/head restraint geometry

Technical measurements for this test

Seat type	Seats with head restraint tilt lock
Geometry
Backset (mm)	48
Distance below top of head (mm)	85
Seat design parameters
Pass/fail	Fail
Max T1 acceleration (g)	0.0
Head contact time (ms)
Force rating	0
Neck forces
Max neck shear force (N)
Max neck tension (N)

Seat type: Seats with adjustable head restraints

Overall evaluation
Dynamic rating
Seat/head restraint geometry

Technical measurements for this test

Seat type	Seats with adjustable head restraints
Geometry
Backset (mm)	60
Distance below top of head (mm)	100
Seat design parameters
Pass/fail	Fail
Max T1 acceleration (g)	0.0
Head contact time (ms)
Force rating	0
Neck forces
Max neck shear force (N)
Max neck tension (N)

Seat type: Seats with fixed head restraints

Overall evaluation
Dynamic rating
Seat/head restraint geometry

Technical measurements for this test

Seat type	Seats with fixed head restraints
Geometry
Backset (mm)	70
Distance below top of head (mm)	125
Seat design parameters
Pass/fail	Fail
Max T1 acceleration (g)	0.0
Head contact time (ms)
Force rating	0
Neck forces
Max neck shear force (N)
Max neck tension (N)

About the head restraint & seat test
Currently, IIHS tests apply only to front seats.