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quote:Originally posted by Jdrobone
My 2011 GMC 3500 dually has a similar setup. A light will come on when "a" tire is low (how much I dunno). Like Carl says it's up to you to determine which one. My dealer wants me to come in and re-fill all seven tires with nitrogen - at GM's expense - he claims that their gurus have determined that this will result in less pressure variation when running and less leakage over time.
We'll see . . .
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Our 2009 2500HD Chevy has the OEM TPMS. The DIC will tell you which tire is low also. Any time a wheel is moved from it's original location, the TPMS must be reset to know which wheel is where. Most shops will do this for a fee; it is really simple on our truck, but might be more complicated on a dual wheel truck.