Revenue

The following table disaggregates our revenue by major source for revenue generating segments:



	Three Months Ended March 31, 2019
	GMNA		GMI		Corporate		Total Automotive		GM Cruise		GM Financial		Eliminations/Reclassifications			Total
Vehicle, parts and accessories	$	25,962	$	3,567	$	—	$	29,529	$	—	$	—	$	—		$	29,529
Used vehicles	627		35		—		662		—		—		—			662
Services and other	776		248		46		1,070		25		—		(25		)	1,070
Automotive net sales and revenue	27,365		3,850		46		31,261		25		—		(25		)	31,261
Leased vehicle income	—		—		—		—		—		2,509		—			2,509
Finance charge income	—		—		—		—		—		987		(2		)	985
Other income	—		—		—		—		—		124		(1		)	123
GM Financial net sales and revenue	—		—		—		—		—		3,620		(3		)	3,617
Net sales and revenue	$	27,365	$	3,850	$	46	$	31,261	$	25	$	3,620	$	(28	)	$	34,878



	Three Months Ended March 31, 2018
	GMNA		GMI		Corporate		Total Automotive		GM Financial		Eliminations			Total
Vehicle, parts and accessories	$	25,882	$	4,605	$	9	$	30,496	$	—	$	(7	)	$	30,489
Used vehicles	1,155		47		—		1,202		—		(17		)	1,185
Services and other	781		196		40		1,017		—		—			1,017
Automotive net sales and revenue	27,818		4,848		49		32,715		—		(24		)	32,691
Leased vehicle income	—		—		—		—		2,447		—			2,447
Finance charge income	—		—		—		—		866		(2		)	864
Other income	—		—		—		—		98		(1		)	97
GM Financial net sales and revenue	—		—		—		—		3,411		(3		)	3,408
Net sales and revenue	$	27,818	$	4,848	$	49	$	32,715	$	3,411	$	(27	)	$	36,099

Revenue is measured as the amount of consideration we expect to receive in exchange for transferring goods or providing services. Adjustments to sales incentives for previously recognized sales were insignificant in the three months ended March 31, 2019 and 2018.

Contract liabilities in our Automotive segments consist primarily of maintenance, extended warranty and other service contracts. We recognized revenue of $433 million and $383 million related to contract liabilities during the three months ended March 31, 2019 and 2018. We expect to recognize revenue of $1.1 billion in the nine months ending December 31, 2019 and $588 million, $396 million and $379 million in the years ending December 31, 2020, 2021 and thereafter related to contract liabilities at March 31, 2019.