SHANGHAI -- General Motors' planned sale of its Hummer brand to a little-known Chinese truck maker could be blocked by regulators who have not approved the deal and are questioning its wisdom, according to The Associated Press.

Sichuan Tengzhong Heavy Industrial Machinery Co. and GM have given no financial details about the planned purchase of the American maker of gas-guzzling, military-style SUVs.

However, any such deal would require Chinese Commerce Ministry approval at the provincial level at least.