We don't have a lot of complaints on file for the GMC C5500 Kodiak (although feel free to add yours here) -- it's either not very popular ... or it's very, very good.
The 2006 GMC C5500 Kodiak has the most complaints, & the most-reported problem is also with the 2006 C5500 Kodiak for injectors failing.
Worst Reported Problems with the C5500 Kodiak
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Latest Owner Complaints About the C5500 Kodiak
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injectors failing -- 2006 C5500 Kodiak:
I purchased a c5500 and a c4500 on the same day. After about 50,000 miles, the 5500 is at the shop more than is on the road. I have had the injectors (all 8) replaced twice, injector pump twice and misc injectors replace "as needed" per the dealer. For the past year it has been in the the shop ... Read more »
This problem has been reported 1 times by other 2006 C5500 Kodiak owners.