Engine stalls at speed. Extremely dangerous. dealer has not yet found solution as of this complaint. they replaced a negative battery cable claiming they fixed the problem. the vehicle stalled again only 15 miles after. GM has not yet stepped up to replace the vehicle or offer any compensation toward a new one. i have had 22 suburbans and i hope to always have one. i am skeptical whether GM will take this extremely dangerous problem with the attention such a problem requires.