Bumpers are one of the most essential auto parts. They serve both
an aesthetic and practical function. They are also important
safety features. Bumpers are made of heavy sheet metal and are
mounted on the front and rear of the car. Bumpers are bent and
formed into specific shapes in order to absorb and deliver
momentum during a collision. In the event of a collision, the
bumper absorbs some of the impact, which decreases damage to the
car and its occupants. It also protects the front of the car by
diverting all of the car's momentum to the object with which it
has collided. The bumper is mounted to the car's chassis with
special impact absorbers. These shock absorbers are often spring
loaded. In slow speed collisions, this allows the bumper to
compress, and then extend back to its original position. All
bumpers are designed to absorb the energy of the impact. They do
this through a series of valves and air chambers.

Some car bumpers have hydraulic chambers. In the event of a
collision, the absorption unit allows air and/or hydraulic fluid
to pass through small openings. Forcing the air/fluid through the
valve openings absorbs the energy from the collision. The
bumper's job is to minimize damage, primarily to the occupants of
the vehicle and to the vehicle itself. US law requires cars to
pass special crash tests at various speeds.

In order to pass, the car's damage level during the crash must be
below a specific dollar level. This protects the consumer and is
very important for keeping the cost of automobile insurance to a
minimum. Sometimes bumpers are constructed with built-in "crumple
zones." Crumple zones are designed to absorb impact; they will
flex on impact. As the metal flexes, the action of the bending
metal converts the kinetic energy of the car into heat. Kinetic
energy is the energy an object possesses while it is in motion.

GM automobiles are all equipped with capable bumpers that help
protect the vehicle from serious damages in the event of a
collision. However, like all auto parts, bumpers will eventually
get damaged or defective due to accidents, wear and tear and
corrosion. Usually such damages will weaken the bumper's ability
to absorb the shock of collision. Thus, it is a necessity to
replace old and damaged bumpers with a new one. Replacement GM
Bumpers can be purchased from auto parts dealers everywhere.
However, to be sure of quality and durability, purchase only from
a reliable and trustworthy auto parts store with an established
reputation.

One of the best choices in auto parts stores today is Auto Parts
Inner. It has already been recognized as an excellent source of
relevant and useful automotive information. Its comprehensive
inside look into the automobile makes one marvel at the
technology that has given us our vehicles. Similarly, it now has
a very comprehensive array of high quality auto parts including
top-notch GM Parts. Auto Parts Inner offers a variety of GM Parts
including GM A/C Condensers, GM Bumpers, GM Carpets, GM Catalytic
Converter, GM Mirror, GM Radiator, GM Spoiler, GM Tailgate, GM
Weatherstripping, GMC fuel tanks and other affordable and high
quality parts.